# Experiment running in builder but stops after 1 trial in pavlovia

**URL:** <https://discourse.psychopy.org/t/experiment-running-in-builder-but-stops-after-1-trial-in-pavlovia/19876>\
**Category:** Online experiments\
**Tags:** pavlovia\
**Created:** [January 24, 2021, 9:52pm UTC](https://discourse.psychopy.org/t/experiment-running-in-builder-but-stops-after-1-trial-in-pavlovia/19876 "2021-01-24T21:52:19Z")\
**Posts on this page:** 1\
**Showing post:** 15

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**Author:** ![jms](https://avatars.discourse-cdn.com/v4/letter/j/e56c9b/32.png) [@jms](https://discourse.psychopy.org/u/jms)\
**Post date:** [January 27, 2021, 7:48pm UTC](https://discourse.psychopy.org/t/experiment-running-in-builder-but-stops-after-1-trial-in-pavlovia/19876/15 "2021-01-27T19:48:40Z")

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If it was a problem with the stimulus loading, wouldn’t the fixation cross for trial 2 show up before going blank? The movies were in gif format but were converted to H.264 mp4s when I got the same error as this person did in [this thread.](https://discourse.psychopy.org/t/using-gifs-as-stimuli-running-online-through-pavlovia/13053/4)  
Each mp4 file is ~69 KB

Regarding trialCount, this code worked before when “trialCount=0” was in the Begin Experiment code component for fixation…but now when moved to instr (outside of the loop) it’s getting this error- should I move it back?

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