PO Charge Account is mandatory and could not be determined

  Hi All,

I am getting below error while creating purchase order,

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APP-PO-14082: A PO Charge Account is mandatory and could not be determined.
Review your account generator setup.
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I am getting this error after I click in Distributions line and Charge Account Field.

Please suggest where in the setup we should check for Account Generator Setup.

Thanks

Po.