Software AG Designer 10.5: Error Opening Mapping service

Dears I have been trying to fix the issue and reinstalled it twice but no luck.
I got this error once clicking in edit data mapping in process flow

any help please?

Hi, Did you check the Integration Server server.log, error log? May it will have some more information on what went wrong.

Thanks.

no logs found in the server.log file :S

Hi,

please try to reload the trialProcess package or as an alternative to restart the IS instance.
Were you able to build and upload the process susccesfully prior to trying to edit the data mapping?

Regards,
Holger