This error can be caused by imported graphics or data corruption. Try
opening all graphics in the application used to create them to check for
corrupted data. Try sending the file to another device to see wether it
is the transfer of data that is causing the problem.
Nesting files (e.g. putting an EPS in another EPS, placing that EPS on
a page, exporting the page to PDF to put it on another page and then saving
that final page as a PS-file to impose it) can also lead to invalrestore
errors. Avoiding excessive nesting while creating or processing documents
is always a good idea. Since it is sometimes impossible to know which
images or other elements already have other files embedded within them,
selectively deleting elements and reprinting the page is sometimes the
only way of finding the bad element.
This error may also be caused by a problem with the printerdriver. Reinstalling
it or upgrading to the latest version might solve the problem.
Distiller generates invalidrestore error
There is a well document error causing Acrobat Distiller to generate
a PostScript error "invalidrestore", offending command "restore".
Niknak causes invalidrestore error
PDF files created by Niknak version 1.1 Patch Level 2 can cause invalidrestore
errors when printed from Exchange to an Adobe RIP. This was fixed in patchlevel
3 of Niknak. | 
