Ah yes, Error -99. We've seen that error in a few different situations. I would recommend opening a ticket with Symantec, because all environments are different and the resolution that worked for me, might not work for you. One resolution was to change the IP address of the LMHOSTS in step 6 of 8 (Network Drive Mappings) in the pre-boot environment configuration to the IP address of the Ghost server.
Have you tried capturing the image to an external hard drive using a USB Ghost Boot Disk?
Maybe try adding the -split=0 switch to the image capturing process?
Have you tried adding any of the below switches to the image capture process?
-notrim -ntexact -ntc- -ntil -ntic -ib
Here is a link explaining swiches in Ghost: https://support.symantec.com/en_US/article.TECH130961.html