We are getting  "An internal stack error - - - . Error code: too many pops."  I believe it is only on one of five workstations.  I noticed a note from NovaZyg on 2/13/08 about an update from 12/15/07 for T7 that fixes 99% of the errors like internal stack errors and too many pops.  It appears we are using T6.  Might that resolve our problem?  We do not have a service contract so do not get updates.  We are currently using IS Tech Support Update 9/27/07, Build 11/8/07.