topic Hello, in Product Forum https://community.blueprism.com/t5/Product-Forum/BO-Global-Code-Compiler-error-4-metadata-file-drv-could-not-be/m-p/68648#M21253 Hello, No, it is not possible to reference a .drv file in Blue Prism code (which is .NET 4.0 based). Mon, 19 Jun 2017 16:02:00 GMT Denis__Dennehy 2017-06-19T16:02:00Z BO Global Code: Compiler error -4: metadata file (drv) could not be opened https://community.blueprism.com/t5/Product-Forum/BO-Global-Code-Compiler-error-4-metadata-file-drv-could-not-be/m-p/68647#M21252 Hello, I have a BO to which I have added external reference to "C:\Windows\System32\winspool.drv" and in Global Code section following lines: [DllImport("winspool.drv", CharSet = CharSet.Auto, SetLastError = true)] private static extern bool SetDefaultPrinter(string Name); When check code I get the following error message: Page: Initialise Stage: Stage1 Type: Error Action: Validate Description: Compiler error at top section line -4: Metadata file 'c:\Windows\System32\winspool.drv' could not be opened -- 'An attempt was made to load a program with an incorrect format. ' Repairable: No Is it possible to import drv files in BP global code? If not, is thetr any workaround for this? I need to retrieve the default printer in C# code block. Best regards, Mikko Wed, 14 Jun 2017 15:03:00 GMT https://community.blueprism.com/t5/Product-Forum/BO-Global-Code-Compiler-error-4-metadata-file-drv-could-not-be/m-p/68647#M21252 MikkoKutilainen 2017-06-14T15:03:00Z Hello, https://community.blueprism.com/t5/Product-Forum/BO-Global-Code-Compiler-error-4-metadata-file-drv-could-not-be/m-p/68648#M21253 Hello, No, it is not possible to reference a .drv file in Blue Prism code (which is .NET 4.0 based). Mon, 19 Jun 2017 16:02:00 GMT https://community.blueprism.com/t5/Product-Forum/BO-Global-Code-Compiler-error-4-metadata-file-drv-could-not-be/m-p/68648#M21253 Denis__Dennehy 2017-06-19T16:02:00Z Please let me know too if you https://community.blueprism.com/t5/Product-Forum/BO-Global-Code-Compiler-error-4-metadata-file-drv-could-not-be/m-p/68649#M21254 Please let me know too if you get a workaround or any solution to this Mon, 19 Jun 2017 16:05:00 GMT https://community.blueprism.com/t5/Product-Forum/BO-Global-Code-Compiler-error-4-metadata-file-drv-could-not-be/m-p/68649#M21254 PrateekMehan 2017-06-19T16:05:00Z Okey, thank you for your https://community.blueprism.com/t5/Product-Forum/BO-Global-Code-Compiler-error-4-metadata-file-drv-could-not-be/m-p/68650#M21255 Okey, thank you for your reply. Br, Mikko Thu, 22 Jun 2017 08:03:00 GMT https://community.blueprism.com/t5/Product-Forum/BO-Global-Code-Compiler-error-4-metadata-file-drv-could-not-be/m-p/68650#M21255 MikkoKutilainen 2017-06-22T08:03:00Z