Field help (AIMPLIE) 

The print server is a multi-processing server.It can thus process 'N' requests in parallel.However, a printer can only print one report at a time.

This means that if two reports are submitted to the same printer, at the same time and on the same print server, the whole Crystal Reports processing phase (SQL requests, formatting, etc...) will be blocked. Only the "paper" production phase is serialized.

This option is used to respect the definition order of reports in the dictionary record and/or when using a segmentation setup.