Diagnosis
When you print with a form (Smartform), the text from the editor iscopied to a buffer on the application server (SAPscript text objectV1, text id v2). during print processing, the form reads the textfrom the buffer. This buffer can only be used by one print process at atime. The buffer is currently locked by another print process.

Procedure
Start printing again at a later time when the other request iscompleted.