If an Error 150 appears on individual ECRs with the message "Invoice Memory Exceeded 25" this relates to a configuration setting that will need to be updated on Commander or on the ECR itself via VPOS Anywhere or locally.
Navigate to 17. Configuration > GC Invoices > Stored Invoices
Increase the values as follows:
Stored Invoices : 500
This should resolve the issue.
Please note this needs done on a till by till basis.