RunningReactionEngineWithLogInputReactor_S::checkHistoryCacheUpdating() was often failing on my Windows XP virtual machine, due to a delay in the appearance of the history cache file. The test now checks if the file exists before trying to open it, and if it doesn't, waits for a second and tries again. The test still occasionally fails in other parts, apparently due to file system delays, but not often enough to warrant spending more time on working around it.
RunningReactionEngineWithLogInputReactor_S::checkHistoryCacheUpdating() was often failing on my Windows XP virtual machine, due to a delay in the appearance of the history cache file.
The test now checks if the file exists before trying to open it, and if it doesn't, waits for a second and tries again.
The test still occasionally fails in other parts, apparently due to file system delays, but not often enough to warrant spending more time on working around it.

acmorrow/pion-core,acmorrow/pion-core,acmorrow/pion-core,acmorrow/pion-core,acmorrow/pion-core,acmorrow/pion-core,acmorrow/pion-core