The analyze recorded response does seem to fair a little better when I include the list of valid responses (i.e., blue, red, green, yellow), but I still get the same error message. Also I believe I've solved the problem with the RT. I simply had to add /responsetime=0 (which didn't seem to be in the original script) to get it to function properly. However there are a few lingering issues.
1. The analyze recorded response is listing the responses completely backwards. In other words, it lists the last trial first and the first trial last, this makes it difficult to re-format this data file for later analyses.
2. Occasionally the entire program crashes. I've run the monkey with no problem, but when I have people run through the task it will still crash from time to time. Not sure what's going on here.
As always, any advice is greatly appreciated.