======6. Issues while working with Produmex Manufacturing======
=====6.1. Exception when creating BxErrorDisplayForm=====
**Issue** \\
When the Produmex Manufacturing add-on is started in SAP Business One, the following error is displayed:

''There was an exception when creating BxErrorDisplayForm: Error in BxFormUI constructor: Object reference not set to an instance of an object.''

{{ :implementation:manufacturing:supportguide:srf_exception.png |}}

**Solution** \\
Remove the SRF files. From the Tools menu select Produmex Manufacturing > SRF File Management > Remove SRF files.

{{ :implementation:manufacturing:supportguide:srf_remove.png |}}