Hi Steve,
Hi Mark
I couldn't see anything wrong with your patch that might cause maps to be missed but it is hard to tell because of the way that CommandArgs works.
So I've attached a patch that is based on your v7 patch that separates out CommandArgs into one class that reads them and another that contains the actual options. The options given to the processor are always copies so there is no need to further copy.
There is also a tweek to make sure that the files are given to the combiners in the order they started.
Many thanks for the contribution, I shall look at it shortly. Unfortunately, I have just discovered another issue which is the static int nextPriority in GType - this needs to be changed to one instance per map but at the moment I can't work out what to use as a key to select the correct value for each map being processed concurrently. If you have any thoughts on that, please say. Cheers, Mark