Dll import bug

 
expert load first time(import a custom dll) , it is all ok;
unload expert it is ok;
load the expert again , get crash or no response!

have tested the dll in other win32 program , works well , but with mt4 , when load the second time , get crash.

why?
 
More details, please. We cannot reproduce your problem.
Try to check our sample dll:
1. Move ExportFunctions.mq4 from experts\samples\ to experts\
2. Move sampledll.mqh from experts\samples\include\ to experts\include\
3. Move ExpertSample.dll from experts\samples\libraries to experts\libraries\