Cannot run compilation because another compilation is in progress

Dear Raghu Ram,

The most obvious reason the the compilation that was launched before or by another system user. Although you might not see it, but once started it should end even if the tab was closed so it might be the thing that when  you were trying to compile previously launched compilation was still in process. 

In case it is occurring all the time and you are sure there is no compilation launched feel free to shoot an email to support@bpmonline.com for further investigation.

Oleh