Error in svd(mat) : infinite or missing values in 'x'

[ahmadabulfathi2]

Dear @andrewhooker,
Could you please help me navigate through the error message I keep getting when I try optimizing sampling scheme:
Total iterations: 336
Elapsed time: 3794.93 seconds.

Final OFV = 308.99
Parameters: 1103.538 4.108349 1431.097 1025.364 3600

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Running BFGS Optimization

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initial value -282.706221
Problems inverting the matrix. Results could be misleading.
Error in svd(mat) : infinite or missing values in 'x'

With kind regards,
Ahmed