Error: The DefaultValue expression for the report parameter ‘AX_CompanyName’ contains an error: The file exists.

Hi DAXers,

while trying to generate/run any report, system raising this error message:

Error while setting server report parameters. Error message: The DefaultValue expression for the report parameter ‘AX_CompanyName’ contains an error: The file exists.
(rsRuntimeErrorInExpression)

I have already searched a lot about the cause of the error and the solution, but no one has broken into this point “The file exists.

Please, help.

thanks in advance.