Scorch 1.2 on iPad 2 (OS 8.0.1) closes

[Kiannejad]

Hi everyone. I export my score using Sibelius 7.5 (Trial version) for Scorch. I then successfully load the score in to Scorch. Its a 20 minutes long piece of music. So far so good.
Scorch plays the first 16 to 16.5 minutes and then it closes. This happens repeatedly every time.
While playing, I can drag the scroll bar (at the bottom of the screen) past 17.5 minutes and then it plays the rest of the score without closing.
Scorch does not crash when it plays individual instruments extracted from the same score.
There is an error report in the iPad reports, but I can not make any sense of the report.

iPad model: 2 - 16GB (4GB available)
I have uninstalled and reinstalled Scorch to no avail.
The score plays fine on my MacMini using Sibelius 7.5 (trial Version) without quitting or crashing.
Any help would be greatly appreciated.
Thanks folks