Error message when adding a new matrix row for an employee

Document ID : KB000113502
Last Modified Date : 11/09/2018
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I am trying to add a new row in matrix for a Resourece whose Resource Code is XXXXX. When I try to save the record, it gives me this error message: REVMGR-20187:Resource code is not valid. The employee is active and there was no problem with his code when another row matrix was created for him. 
This error pops up when you try to define a row in the matrix for a resource whose resource class is different than what you have defined. 

In this case the Resource has a Resource Class 'X' but you are trying to define 'Y' as his Resource Class and hence PPM is throwing the error. 

Change the resource class from Resource profile to 'Y' or configure the rate in the matrix to show 'X' as the resource class.