https://community.blueprism.com/t5/Product-Forum/Compilation-Error-in-internal-BP-VBO-s-has-been-deleted/m-p/45279#M1544 For us rolling back the latest.NET framework upgrade solved the issue .   Thanks Vishrut Thu, 30 Aug 2018 20:44:00 GMT Anonymous 2018-08-30T20:44:00Z https://community.blueprism.com/t5/Product-Forum/Compilation-Error-in-internal-BP-VBO-s-has-been-deleted/m-p/45278#M1543 Hi All , I am facing a compilation error in all the VBO's . Below is the error : Page: Initialise Stage: Stage1 Type: Error Action: Validate Description: Compiler error at top section line -9: unable to open response file 'C:\Users\Username\AppData\Local\Temp\abcdef\abcdef.cmdline' Repairable: No The folder and file abcdef\abcdef.cmdline are created at compile time and differ for each Obj .   I am facing this from couple of days , before that every thing was working fine . Thu, 30 Aug 2018 20:09:00 GMT https://community.blueprism.com/t5/Product-Forum/Compilation-Error-in-internal-BP-VBO-s-has-been-deleted/m-p/45278#M1543 Anonymous 2018-08-30T20:09:00Z https://community.blueprism.com/t5/Product-Forum/Compilation-Error-in-internal-BP-VBO-s-has-been-deleted/m-p/45279#M1544 For us rolling back the latest.NET framework upgrade solved the issue .   Thanks Vishrut Thu, 30 Aug 2018 20:44:00 GMT https://community.blueprism.com/t5/Product-Forum/Compilation-Error-in-internal-BP-VBO-s-has-been-deleted/m-p/45279#M1544 Anonymous 2018-08-30T20:44:00Z