Hi ChelleO,
Seems that the error is related to the the PH rebates codes within the platform. To help you troubleshoot this, please ensure that the PH rebate codes you are using are correct and up-to-date. Sometimes, errors can occur if the codes have been updated or changed. Also, make sure that your MYOB Practice Tax software is updated to the latest version. This can help resolve any compatibility issues that might be causing the error.
Hopefully Mike_James, who knows coding and our products really well, can jump in here and offer some advice.
Cheers,
Princess