Hi, I'm new to the forum but not to JPSoft products. I date back to NDOS/4DOS and the old CompuServe Support Forum. I stayed a t Take Command version 8.02.92 for a long time and I have many, many .btm files that take advantage of the features of that version. I finally purchased an upgrade to V16 6 or 7 months ago, but I did not get around to installing it until a few days ago (actually to V17). Here's my newbie question: v8 to v17 is a big jump. What reading do I need to do understand what, if anything, might break my existing batch files? I'm willing to do the reading, but if anyone can direct me to FAQ listings or search terms for past thread topics where this has been discussed, I'd appreciate it.