Since I’m getting tired of hearing about it…
C2toDS DOES NOT WORK WITH C1toDS.
THERE IS NOT, AND WILL NOT BE, A FIX FOR THIS ISSUE, AS THERE IS NO IDENTIFIABLE REASON FOR THEIR INCOMPATABILITY OTHER THAN ENGINE LIMITS. IT IS NOT AN ERROR WITH C2TODS.
You MAY get lucky if you install C1toDS AFTER C2toDS, but even that doesn’t work all the time.