Custom Connector issue

[learner03]

I was given a Custom connector by Warehouse mgmt system to build reports.

I created few reports and installed personal gateway on my compter to rum the refresh in Power Bi serice.

Everthing was going fine untill I requested tem to extend few of the tables in the cusotm connector with more information. I have been given a new connector and when I replaced the old one with the new, all the report refresh failed. 

I investigated and founf some below errors-

and when I looked into the import process where we go "get data", in some of the tables I am seeing this below-

I have done many tranformation steps while creating the reports with old connector and it is not possible for me to do the same again.

Where have the things gone wrong?

[Anonymous]

@learner03 

It is difficult for us to provide the actual fixes without the actual model unless you can share a sample pbix.

For expression errors, you need to detect the error based on the error message, e.g. reduce the arguments as the message mentioned, and check if the column name can be found in the datasource, and whether the connection is valid.

Best
Paul