I had a problem with procad software (isometric ) proper installed and opened on my autocad but when i try to create new work file it shows ( autocad had locked your file dated 2015 ).Note : I recently installed the procad as trial version and my autocad proper instelled.Please help how to solve this matter.   Regards

I am not aware that AutoCAD itself has the ability to lock a file all on its own.If the file is new how is it that the message you received references 2015?  That makes no sense.Visit the Procad website and look for Procad> AutoCAD > Errors and see if any of the listed errors match up with what you are encountering.  Could it be that the drawing file is invalid?  Did you try a RECOVER?
John Connor2018-12-22 14:19:30