Great Suggestions!!! Appreciate the responses from Gunnerp245 and aidren very much. I took a file that Repligo could not read on the tablet side, set it to Acrobat Ver 4 (PDF 1.3) using the method above (PDF Optimizer) and it worked fine reading from the internal sd card. I tried first setting it to Acrobat 5 did not work at all. Furthermore, this file could also be read by Repligo from the USB memory or the external SD card. This is super and a big help. Repligo works very well with bookmarks, etc. I really appreciate all of your help.