BC-DWB-DIC-F4

Getting Dump in one of the Standard transaction WCT7.When I change the value manually instead of the F4 help it is going to Dump. The dump is not happening all the time .sometime happening and some time not happening.I am using the SAP GUI 730 and Patch Level is 14.

The dump is

Category ABAP programming error
Runtime Errors OBJECTS_NOT_CHARCONV
ABAP Program CL_DSH_SAPGUI_TYPE_AHEAD======CP
Application Component BC-DWB-DIC-F4
Date and Time 21.08.2017 11:33:26

Error analysis
In statement
'WRITE
, only data objects that can be converted to a character-type type are
supported at argument position "<DYNAMIC_COMPONENT>'".

In this case, operand "<DYNAMIC_COMPONENT>'" has type "WCTP1_INFLUENCE_TYPE".

CL_DSH_SAPGUI_TYPE_AHEAD======CP