Unhandled COMException (Interop.SAPbobsCOM) in 2007A PL48

hi,

i just upgraded my system to 2007A pl48 and now an unhandled exception is thrown in my Addon:

the unhandled exception is thrown in second line:

StackTrace: at SAPbobsCOM.ICompany.GetBusinessObject(BoObjectTypes Object)

Dim oUserFieldsMD As SAPbobsCOM.UserFieldsMD
oUserFieldsMD = moSBOCompany.GetBusinessObject(SAPbobsCOM.BoObjectTypes.oUserFields)

Is it a new bug of pl48 or did something changed?

best regards

Markus