printnum( E2END+1 ); what is this problem?

[byjgvvhjgt]

Help, i am newcomer and i have esp8266 and i in compilation see the error "TinyBasicPlus:1071:13: error: 'E2END' was not declared in this scope

printnum( E2END+1 );

         ^

exit status 1

'E2END' was not declared in this scope
"
what is this?
sorry for this text, i am 12 years old