MPI too large

[Boyce, Collin]

When decrypting a file I get the following error message.   I saw
previous posts but was unable to find what the resolution

Error:
gpg: mpi too large for this implementation (55559 bits)

Command line
Echo passpharase| gpg --passphrase-fd 0  -u xx at xx.edu  --batch --openpgp
-o "position.txt" --decrypt "position.txt.pgp"

Platform:
Microsoft Windows 2000 [Version 5.00.2195]
gpg (GnuPG) 1.4.2.2



Any help would be appreciated.


Thanks