If you're getting that sort of error it's likely that there was a problem during recording. For example if it was recorded on the iPad and the iPad was low on resources / storage space or unable to keep up it could cause a recording error.
If it's possible to zip the script to less than 10mb in size, could you email it to me at
[email protected] together with info on what it was recorded with ( which version of ArtRage and what device ) and what it was played back on ( version of ArtRage ) and we can take a look at it to see if we can get any more information.