Try exporting the piece as XML, and importing it back in. That often clears up weird corruption.

Never did that before.  I will try it. 

If this still happens after an xml export/import, you have something going on at meas. 74.

There have been a number of threads on this over the years with more than one cause. Search for playback stops at in the upper right of this page to see them.

Thanks, Mike H.  I had looked at those and after your suggestion looked at more of them.  This issue was not describedin the eight pages I reviewed.  The entire score will play properly.  It is only during an attempt to "export" as an audio file that all parts except the first one "hang" or an instant, then start playing aloud without recording further. I have not finished trying Mike R.'s suggestion, as when I did it last evening after seeing his  comment, it wiped all the settings from "score" and it takes a while to reset the six different  voices from UVI and NI in each part. (I have not yet tried using only Garritan voices to see if there is some issue with the use of 3d part voices--but I've done a lot of this in the past and not run into this particular issue.)  I'm at it now and hope to know soon if the xml "wipe" worked.   Thanks for the suggestion.

Tried the xml approach.  It did not work. Now I will open a case and submit the file to see if Tech folks

can find whatever it is that is causing this.  I did try substituting different Garritan voices for each of the

3d party voices I was using--but to no effect.   There must be something embedded in the code that

runs the program.  How it got there would be helpful to know--perhaps to others as well.  Thanks

to both of you Mikes for the suggestions.  Best regards. 

This has probably already occurred to you, but how much free space do you have on the hard drive to which you are exporting?

I mentioned in the description of my system that the external drive is 4Tb, of which close to 2Tb are available.