I'm getting this weird error:
* $dll: unable to open 'D:\pre\functions.dll'
when using $dll(functions.dll,VisualToLogical,$1-)

The DLL is NOT in use!
I can use it from another computer (same file, I'm accessing it with my home network)

Any ideas guys?
thanks!

try change directory like c:\dlls\dll.dll

Trt ro use $dll(D:\pre\functions.dll,VisaulToLogical,$1-)
and see what happends.