Datasource test step - path not retained after updating from github repository

Have a Datasource test step using Excel data sheet  and checkin to GitHub.

When I update from repo the path to the Excel data sheet is no longer recognized.

 

I have to manually browse to the Excel sheet

 

Location of Excel sheet:

C:\ArthrexWebServicesSQA\DotNet\DotNet_Soap_Reports_BP\DataSheets

 

when the project is saved and uploaded to GitHub it is stored as:

C:/ArthrexWebServicesSQA/DotNet\DotNet_Soap_Reports_BP/DataSheets

 

All this was working until just recently... so not sure what has changed.  Happening on many machines.

 

thanks