SAP Message >0146 - Tax amount/tax base have different +/- signs in item &1

Diagnosis An error occurred during calculation of tax. This means that the amountto be taxed has a different +/- sign than the tax amount itself. System Response The document cannot be posted. Procedure INCLUDE NA_SYSADMIN1 OBJECT DOKU ID TX Procedure for System Administration INCLUDE FICA_NA_OSS OBJECT DOKU ID TX