OCS Case_Blue_GBII v5.10 map graphics issue

I’m getting a weird repeatable error with v5.10 of the Case Blue_GBII vassal mod.

I get blank spots in the map that move around from one zoom level to the next, but are in the same map location for any given zoom level.
I uninstalled and deleted the mod
Then reinstalled…same error
Same error in both Vassal 3.2.17 and in 3.4.9
When I load the mod I get a variable number of Bad data errors, that reference the same multi character alphabet soup.
See images
Any thoughts??

  1. Try 3.4.10. We fixed a bug that may be relevant for your problem.
  2. If that doesn’t work, clear your tile cache. (Module Manager: Tools > Clear Tile Cache)

It was the tile cache…thank you very much!