GVP 7.6 Vox limitation?

Hello all,
I am running into an issue with GVP 7.6. I am writing an app that concats a long stink of vox files that is played via a variable in a menu block. after playing 30 (give or take) the app seizes up. It will not accept DTMF or speech. It never exits the menu block. I tried inserting TTS breaks every 10th file but that made no difference. This is a studio built app. Any ideas?

thanks for reading.

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