Issues with SemigroupsTestStandard( ); on Windows

[josiahaakre]

I've installed Gap and all the necessary packages on Windows. On running the SemigroupsTestStandard() command, most of the tests worked, but a few failed at the end.

Here is the output from running the command SemigroupsTestStandard( )

gap> SemigroupsTestStandard( );
#I  Running tests with acting methods enabled
Architecture: x86_64-pc-cygwin-default64-kv10

testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/attributes/acting.tst
     188 ms (125 ms GC) and 48.4MB allocated for attributes/acting.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/attributes/attr.tst
    1172 ms (438 ms GC) and 435MB allocated for attributes/attr.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/attributes/dual.tst
     422 ms (250 ms GC) and 51.1MB allocated for attributes/dual.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/attributes/factor.tst
    1156 ms (485 ms GC) and 244MB allocated for attributes/factor.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/attributes/homomorph.tst
    1812 ms (560 ms GC) and 315MB allocated for attributes/homomorph.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/attributes/inverse.tst
     328 ms (235 ms GC) and 87.4MB allocated for attributes/inverse.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/attributes/isomorph.tst
    1094 ms (376 ms GC) and 232MB allocated for attributes/isomorph.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/attributes/isorms.tst
    2547 ms (657 ms GC) and 1.29GB allocated for attributes/isorms.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/attributes/maximal.tst
     719 ms (422 ms GC) and 225MB allocated for attributes/maximal.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/attributes/properties.tst
    1344 ms (641 ms GC) and 493MB allocated for attributes/properties.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/attributes/semifp.tst
     187 ms (171 ms GC) and 538KB allocated for attributes/semifp.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/attributes/translat.tst
    1609 ms (451 ms GC) and 408MB allocated for attributes/translat.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/congruences/cong.tst
     329 ms (235 ms GC) and 117MB allocated for congruences/cong.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/congruences/conginv.tst
     375 ms (203 ms GC) and 172MB allocated for congruences/conginv.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/congruences/conglatt.tst
    1250 ms (279 ms GC) and 156MB allocated for congruences/conglatt.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/congruences/congpairs.tst
     406 ms (234 ms GC) and 36.3MB allocated for congruences/congpairs.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/congruences/congrees.tst
     469 ms (359 ms GC) and 141MB allocated for congruences/congrees.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/congruences/congrms.tst
     281 ms (235 ms GC) and 25.0MB allocated for congruences/congrms.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/congruences/congsemigraph.tst
     250 ms (204 ms GC) and 12.5MB allocated for congruences/congsemigraph.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/congruences/congsimple.tst
     265 ms (187 ms GC) and 33.7MB allocated for congruences/congsimple.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/congruences/conguniv.tst
     235 ms (188 ms GC) and 23.3MB allocated for congruences/conguniv.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/congruences/congwordgraph.tst
     234 ms (187 ms GC) and 2.36MB allocated for congruences/congwordgraph.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/elements/bipart.tst
     250 ms (188 ms GC) and 14.8MB allocated for elements/bipart.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/elements/blocks.tst
     203 ms (203 ms GC) and 2.18MB allocated for elements/blocks.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/elements/boolmat.tst
     203 ms (171 ms GC) and 3.51MB allocated for elements/boolmat.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/elements/elements.tst
     172 ms (172 ms GC) and 1.88MB allocated for elements/elements.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/elements/ffmat.tst
     266 ms (203 ms GC) and 16.8MB allocated for elements/ffmat.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/elements/maxplusmat.tst
     203 ms (187 ms GC) and 3.21MB allocated for elements/maxplusmat.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/elements/pbr.tst
     219 ms (204 ms GC) and 2.11MB allocated for elements/pbr.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/elements/pperm.tst
     203 ms (203 ms GC) and 106KB allocated for elements/pperm.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/elements/semiringmat.tst
     250 ms (187 ms GC) and 3.28MB allocated for elements/semiringmat.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/elements/trans.tst
     312 ms (218 ms GC) and 53.1MB allocated for elements/trans.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/fp/freeband.tst
     360 ms (234 ms GC) and 40.5MB allocated for fp/freeband.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/fp/freeinverse.tst
     437 ms (202 ms GC) and 71.7MB allocated for fp/freeinverse.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/fp/tietze.tst
     250 ms (203 ms GC) and 19.2MB allocated for fp/tietze.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/fp/word.tst
     203 ms (203 ms GC) and 197KB allocated for fp/word.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/greens/acting-inverse.tst
     235 ms (204 ms GC) and 16.7MB allocated for greens/acting-inverse.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/greens/acting-regular.tst
     219 ms (172 ms GC) and 35.8MB allocated for greens/acting-regular.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/greens/acting.tst
    2390 ms (642 ms GC) and 695MB allocated for greens/acting.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/greens/froidure-pin.tst
    1703 ms (702 ms GC) and 480MB allocated for greens/froidure-pin.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/greens/generic.tst
     688 ms (484 ms GC) and 196MB allocated for greens/generic.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/ideals/acting.tst
     453 ms (327 ms GC) and 129MB allocated for ideals/acting.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/ideals/froidure-pin.tst
     234 ms (218 ms GC) and 9.33MB allocated for ideals/froidure-pin.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/ideals/ideals.tst
    1703 ms (1016 ms GC) and 660MB allocated for ideals/ideals.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/libsemigroups/cong.tst
     266 ms (235 ms GC) and 23.1MB allocated for libsemigroups/cong.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/libsemigroups/froidure-pin.tst
     297 ms (219 ms GC) and 21.2MB allocated for libsemigroups/froidure-pin.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/libsemigroups/sims1.tst
     437 ms (218 ms GC) and 15.9MB allocated for libsemigroups/sims1.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/main/acting.tst
     360 ms (235 ms GC) and 86.4MB allocated for main/acting.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/main/froidure-pin.tst
     312 ms (217 ms GC) and 39.2MB allocated for main/froidure-pin.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/main/semiact.tst
     360 ms (234 ms GC) and 71.0MB allocated for main/semiact.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/main/setup.tst
     281 ms (219 ms GC) and 17.3MB allocated for main/setup.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/obsolete.tst
     187 ms (187 ms GC) and 46.6KB allocated for obsolete.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/options.tst
     204 ms (204 ms GC) and 156KB allocated for options.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/semigroups/grpperm.tst
     250 ms (219 ms GC) and 11.5MB allocated for semigroups/grpperm.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/semigroups/semibipart.tst
     812 ms (390 ms GC) and 183MB allocated for semigroups/semibipart.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/semigroups/semiboolmat.tst
     625 ms (265 ms GC) and 97.7MB allocated for semigroups/semiboolmat.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/semigroups/semicons.tst
    1203 ms (282 ms GC) and 168MB allocated for semigroups/semicons.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/semigroups/semidp.tst
     985 ms (437 ms GC) and 240MB allocated for semigroups/semidp.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/semigroups/semieunit.tst
     546 ms (313 ms GC) and 120MB allocated for semigroups/semieunit.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/semigroups/semiex.tst
     641 ms (235 ms GC) and 176MB allocated for semigroups/semiex.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/semigroups/semiffmat.tst
    1797 ms (437 ms GC) and 307MB allocated for semigroups/semiffmat.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/semigroups/semifp.tst
     906 ms (298 ms GC) and 171MB allocated for semigroups/semifp.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/semigroups/semigraph.tst
     266 ms (250 ms GC) and 833KB allocated for semigroups/semigraph.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/semigroups/semigrp.tst
    1125 ms (375 ms GC) and 505MB allocated for semigroups/semigrp.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/semigroups/semimaxplus.tst
     453 ms (281 ms GC) and 38.8MB allocated for semigroups/semimaxplus.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/semigroups/semipbr.tst
     562 ms (265 ms GC) and 89.7MB allocated for semigroups/semipbr.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/semigroups/semipperm.tst
     875 ms (424 ms GC) and 260MB allocated for semigroups/semipperm.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/semigroups/semiquo.tst
     438 ms (234 ms GC) and 73.3MB allocated for semigroups/semiquo.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/semigroups/semirms.tst
    4203 ms (1281 ms GC) and 5.97GB allocated for semigroups/semirms.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/semigroups/semitrans.tst
    1328 ms (499 ms GC) and 433MB allocated for semigroups/semitrans.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/tools/display.tst
     360 ms (250 ms GC) and 29.0MB allocated for tools/display.tst
testing: /opt/gap-4.15.1/pkg/semigroups/tst/standard/tools/io.tst
######## > Diff in:
/opt/gap-4.15.1/pkg/semigroups/tst/standard/tools/io.tst:221
# Input is:
WriteMultiplicationTable(name, tables);
# Expected output:
IO_OK
# But found:
Error, couldn't open the file /opt/gap-4.15.1/pkg/semigroups//data/tst/tmptabl\
es
########
######## > Diff in:
/opt/gap-4.15.1/pkg/semigroups/tst/standard/tools/io.tst:223
# Input is:
WriteMultiplicationTable(name, tables, "w");
# Expected output:
IO_OK
# But found:
Error, couldn't open the file /opt/gap-4.15.1/pkg/semigroups//data/tst/tmptabl\
es
########
######## > Diff in:
/opt/gap-4.15.1/pkg/semigroups/tst/standard/tools/io.tst:230
# Input is:
WriteMultiplicationTable(file, tables);
# Expected output:
IO_OK
# But found:
Error, the 1st argument is not a string or a file
########
######## > Diff in:
/opt/gap-4.15.1/pkg/semigroups/tst/standard/tools/io.tst:232
# Input is:
IO_Close(file);
# Expected output:
true
# But found:
Error, Usage: IO_Close( f ) with IsFile(f) and f open
########
######## > Diff in:
/opt/gap-4.15.1/pkg/semigroups/tst/standard/tools/io.tst:238
# Input is:
WriteMultiplicationTable(name, [table]);
# Expected output:
Error, the 2nd argument is not a collection of rectangular tables containing o\
nly integers
# But found:
Error, couldn't open the file /opt/gap-4.15.1/pkg/semigroups//data/tst/tmptabl\
es
########
######## > Diff in:
/opt/gap-4.15.1/pkg/semigroups/tst/standard/tools/io.tst:242
# Input is:
WriteMultiplicationTable(name, [table]);
# Expected output:
Error, the 2nd argument is not a collection of rectangular tables containing o\
nly integers
# But found:
Error, couldn't open the file /opt/gap-4.15.1/pkg/semigroups//data/tst/tmptabl\
es
########
######## > Diff in:
/opt/gap-4.15.1/pkg/semigroups/tst/standard/tools/io.tst:261
# Input is:
WriteMultiplicationTable(name, [table]);
# Expected output:
IO_OK
# But found:
Error, couldn't open the file /opt/gap-4.15.1/pkg/semigroups//data/tst/tmptabl\
es
########
######## > Diff in:
/opt/gap-4.15.1/pkg/semigroups/tst/standard/tools/io.tst:263
# Input is:
WriteMultiplicationTable(name, [table + 250]);
# Expected output:
Error, the 2nd argument is not a collection of rectangular tables with integer\
 entries from [1, 2, ..., n] (where n equals the number of rows of the table)
# But found:
Error, couldn't open the file /opt/gap-4.15.1/pkg/semigroups//data/tst/tmptabl\
es
########
######## > Diff in:
/opt/gap-4.15.1/pkg/semigroups/tst/standard/tools/io.tst:267
# Input is:
WriteMultiplicationTable(name, [table]);
# Expected output:
Error, the 2nd argument is not a collection of rectangular tables with at most\
 255 rows
# But found:
Error, couldn't open the file /opt/gap-4.15.1/pkg/semigroups//data/tst/tmptabl\
es
########
rm: cannot remove '/opt/gap-4.15.1/pkg/semigroups//data/tst/tmptables': No such file or directory
     375 ms (250 ms GC) and 7.53MB allocated for tools/io.tst
-----------------------------------
total     48282 ms (22618 ms GC) and 15.9GB allocated
              9 failures in 1 of 72 files

#I  Errors detected while testing

false

[reiniscirpons]

Hi @josiahaakre thanks for the bug report. Looks like some sort of permissions issue to me rather than a bug in Semigroups itself (i.e. GAP is trying to write a file in a directory it is not allowed to access).

How do you have GAP installed, is it using the GAP .exe installer for windows (https://www.gap-system.org/install/windows/) or using the Windows Subsystem for Linux (WSL, see e.g. https://libsemigroups.github.io/tutorial/gap/install/)?

[josiahaakre]

I used the Gap installer for Windows.

…

On Thu, 28 May 2026 at 14:13, Reinis Cirpons ***@***.***> wrote: *reiniscirpons* left a comment (semigroups/Semigroups#1190) <#1190 (comment)> Hi @josiahaakre <https://github.com/josiahaakre> thanks for the bug report. Looks like some sort of permissions issue to me rather than a bug in Semigroups itself. How do you have GAP installed, is it using the GAP installer for windows (https://www.gap-system.org/install/windows/) or using the Windows Subsystem for Linux (WSL, see e.g. https://libsemigroups.github.io/tutorial/gap/install/ for more details)? — Reply to this email directly, view it on GitHub <#1190?email_source=notifications&email_token=CEDKM3J4DXMKDXAQWIV24FL45A3O5A5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTINJWGQZDSMZSGU4KM4TFMFZW63VHNVSW45DJN5XKKZLWMVXHJLDGN5XXIZLSL5RWY2LDNM#issuecomment-4564293258>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/CEDKM3K4UWZGQFU4F4DBVXL45A3O5AVCNFSM6AAAAACZCNGUPOVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHM2DKNRUGI4TGMRVHA> . Triage notifications, keep track of coding agent tasks and review pull requests on the go with GitHub Mobile for iOS <https://github.com/notifications/mobile/ios/CEDKM3PVXYAQGPALKWYNR2345A3O5A5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTINJWGQZDSMZSGU4KM4TFMFZW63VHNVSW45DJN5XKKZLWMVXHJKTGN5XXIZLSL5UW64Y> and Android <https://github.com/notifications/mobile/android/CEDKM3NUWVCJJXLMONBD37345A3O5A5CNFSNUABFM5UWIORPF5TWS5BNNB2WEL2JONZXKZKDN5WW2ZLOOQXTINJWGQZDSMZSGU4KM4TFMFZW63VHNVSW45DJN5XKKZLWMVXHJLTGN5XXIZLSL5QW4ZDSN5UWI>. Download it today! You are receiving this because you were mentioned.Message ID: ***@***.***>

[reiniscirpons]

@josiahaakre Could you try running the following code in a GAP session and post the results?

LoadPackage("Semigroups");
tables := [[[1, 1], [1, 1]], [[2, 2], [2, 2]]];;
name1 := "/opt/gap-4.15.1/pkg/semigroups/data/tst/tmptables";
WriteMultiplicationTable(name1, tables);
name2 := "/opt/gap-4.15.1/pkg/semigroups//data/tst/tmptables";
WriteMultiplicationTable(name2, tables);

It could be that the doubled slash // is causing some issues.