Cause of error "Caught "std::exception" Exception message is: basic_string::substr: __pos (which is 18446744073709551615) > this->size() (which is 52)"

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Robert Kirkby 2021-3-24

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https://ww2.mathworks.cn/matlabcentral/answers/781648-cause-of-error-caught-std-exception-exception-message-is-basic_string-substr-__pos-which-is

评论： Joss Knight 2021-3-27

I get the following error message when using 'arrayfun()' to evaluate a function on the gpu. (I have often used this command without this error)

Caught "std::exception" Exception message is:
basic_string::substr: __pos (which is 18446744073709551615) > this->size() (which is 52)

I cannot understand the cause. Any ideas?

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Joss Knight 2021-3-25

Thanks, I'll check it out.

Joss Knight 2021-3-27

Unfortunately I cannot reproduce this. You might have to capture the value of the variables used in the arrayfun call in a mat-file so I can be sure of getting the exact same numbers.

This isn't the first problem we've seen on Ubuntu 20. It might be worth downgrading your GPU driver to a 455 to see if that's the problem. You can start here to search for archived drivers for your GPU.

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