TIA v11 printing issues

Hi,
I am having problems printing program blocks in TIA Portal v11. I am trying to print to a PDF with Adobe Acrobat X installed.
The error code is:
"Printing (0027:000020)
The document could not be created due to an internal error."
The print progress bar appears in the bottom right of the window but the print never happens and the above message appears, followed by the TIA Portal crashing.
I have searched online but can can find no solution. Anyone come across this before?

Many thanks

Duncan Hill

No, I can print the networks to a pdf alright. I use CutePDF, though. Are you sure there is no issue with Acrobat?

Think Acrobat is OK - managed to print the networks to PDF last night, now having same problem again. One network printed and now the error keeps occuring. Same problem trying to print the HMI screens to PDF.