When running a program that performs a loop to send data to Excel print and save the workbook it creates I get the following message.

Access Violation (Oxc0000005) Address 0x0044cd64

I can't work out why this is happening - I have run the process before without any problems. The only thing I can think of that may be causing this is a reduction in the available disk space on my machine - has anyone come across this problem before.

Thanks.
Martin