install success，but run error

[fttt]

I successfully installed xlearn using cmake(3.12) and gcc(6.1.0)，but when I run the following statement,： ./xlearn_train ./small_train.txt -s 2 -v ./small_test.txt -x acc，which copy from run_example.sh. an error occurred： terminate called after throwing an instance of 'std::logic_error' what(): basic_string::_M_construct null not valid Aborted (core dumped). I want to know how I can solve this problem, thanks!

[sroylee]

I am having the same problem...

[philipskokoh]

set the USER environment variable when running the code. It seems that the code checking USER environment variable. Try: USER='test' ./xlearn_train ./small_train.txt -s 2 -v ./small_test.txt -x acc

[dward4]

Thanks @philipskokoh That worked for me; I had the same error.

[binayakpokhrel]

xlearn c++ code uses multi-threading, so while accessing the hardware it need the user variable in the environment. And because if c compiler version issue the init_log() parameter is empty. So we have to initialize it by ourself. So basically write USER = 'Test' before command.