12-04-2018 01:11 PM
I would start by updating to the current 4.9.2 version because this error may have been something addressed in the updates since 4.8.3 was released.
In DPP, click on help and check for updates to easily install the latest version. I remember some flakiness with the stamp tool in one version of DPP but I can't remember which version. I haven't used it much, primarily to remove a spot in the sky from debris on the sensor I didn't notice while traveling and I don't recall which version of DPP was current at that time but it generated random errors.