APP announces a critical error: Too many pictures may be overlapped, not enough memory (even after restarting the computer and running no other program; there are 8 GB RAM, 64bit-system).
The pano includes 135 images containing 5 exposure brackets of 27 shots in three rows. Each image was downsized before to 1600 Pixels for the long side. APP estimated the dimensions 19 x 9 inch/300 ppi.
Output should have been a HDR-File.
I have sorted the layers in different ways as the error-prompt says, but it didn't help.
I have processed a similar HDR-Output with APP before, I'm not quite sure, but I guess the pano was even larger.
What went wrong this time?
APP/APG 3.x is more demanding of hardware than earlier versions, in my experience.
You might find it easier, and better, to process your bracketed exposures before stitching.
What settings did you have for your stacks?