Navigate to the Forms folder in your data path. See Article ID 10165: How to find data path and program path in Related Resources. 
Delete all *.PTR files
Create a new folder on your desktop.
Navigate to your specific company’s folder. See Article ID 10199:How to locate company directories Related Resources.
Move all *.PTR, *.LCK, *.PTL, *.DDF, and *.FRM files to the folder […]

Resolution for '*.PTL issue: 'Error: “Encountered an improper argument” when printing forms' available: Yes.

The *.PTL issue or error code is a known related to Sage Accounting products. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the *.PTL issue yourself by looking for a resolution described in the article. If it is a complex *.PTL issue or you are unable to solve the issue, you may contact Sage Repair by clicking here or by using other *.PTL support options.

For more information about resolving issues related to *.PTL in Sage Accounting or to get support for the issue 'Error: “Encountered an improper argument” when printing forms', click the link below: