If you do WRKOBJ QSYS/QPSRVTRCJ
You will find it is a printer file.
If it is full, it means you have reached the MAXRCDS limit.
You should be able to respond to an error message that you would like the file expanded if you want too. Just like a PF,
You can also do a CHGPRTF and change the value for MAXRCDS so you do not get this again.
The real question is what is printing and do you want it?