PGP Command Line generates an error when attempting to decrypt large files. The error is likely to occur when the contents of the encrypted file exceeds the available RAM on the system.
3090:operation failed, sizeAdvise promise not kept
Symantec PGP Command Line releases 10.4.2 MP1, 10.4.2 MP2 and 10.4.2 MP4.
There is insufficient memory to decrypt the entire file.
Upgrade to PGP Command Line 10.5 or above.
If you cannot upgrade, to workaround the issue, decrypt the file with PGP Command Line 10.4.2. Alternatively, on a 64 bit system, increasing the RAM may also workaround the issue.