Error occurred during budget check

Good Morning PS Gurus<

We are unable to increase the quantity of the matearil
in project & save. It’s throwing error

  Error occurred during budget check, see cost protocal

  Message Number :IW172

  Diagnosis:

  An error occurred during budget availabilty check

  Procudure:

  Display the cost determination log for the order or network plan for more detailed information.

   We do’t have budget in our project. I checked budget TL ( it said warning message:1)

Please throw light on this issue.

Thanks

PY