I got this error when testing my webapp quote screen
What I did was to change the customer in an already saved quote header
What am I doing wrong

C:\DataFlex Projects\TestMobileAPP\Programs\WebApp.exe
Attempt to run uncompiled expression BRANCH 1
VDF Error#: 56 in line: 43015.

MSG_UNHANDLEDERRORDISPLAY (4698) - oWebAppError (4) - at address 5853
MSG_ERROR_REPORT (433) - oWebAppError (4) - at address 5842
MSG_ERROR_REPORT (433) - oErrorHandler (22) - at address 15997
MSG_REQUEST_SAVE (375) - Quote_DD (3134) - at address 4051
MSG_REQUESTSAVEEXEC (5882) - oQuoteMain (2979) - at address 17346
MSG_REQUESTSAVECALLBACK (5870) - oQuoteMain (2979) - at address 17289
MSG_VERIFYREQUEST (5876) - oQuoteMain (2979) - at address 17173
MSG_REQUEST_SAVE (375) - oQuoteMain (2979) - at address 17327
MSG_REQUEST_SAVE (375) - oActionGroup (3261) - in native code
MSG_REQUEST_SAVE (375) - oSaveBtn (3262) - in native code
MSG_ONCLICK (6324) - oSaveBtn (3262) - at address 44503
GET_HANDLEACTION (5703) - oSaveBtn (3262) - at address 14697
GET_CALLACTION (6203) - oWebApp (19) - at address 20514
GET_CALLACTION (6203) - oWebServiceDispatcher (35) - at address 20209
GET_DOCALL (1284) - oCallInterface (36) - in native code
GET_DOCALL (1284) - oWebServiceDispatcher (35) - at address 10015
MSG_ONDFFUNC (5001) - oVDFInetSession (25) - at address 8585
MSG_STARTWEBAPP (5789) - oWebApp (19) - at address 15859
[start] - at address 45144

attached is view concerned