1 . Error while file upload. 2 . At least one BRF message of type W, E, A, or X occurred 3 . Balanc

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Error while file upload.|At least one BRF message of type W, E, A, or X occurred|Balance Payable should not be more than zero|

Why does this error occur?

Error while file upload.
At least one BRF message of type W, E, A, or X occurred
Balance Payable should not be more than zero
Credit carried forward cannot be more than Excess Credit available