# Data output-missing data

**URL:** <https://discourse.psychopy.org/t/data-output-missing-data/40015>\
**Category:** Builder\
**Created:** [May 14, 2024, 1:02am UTC](https://discourse.psychopy.org/t/data-output-missing-data/40015 "2024-05-14T01:02:10Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jgove](https://avatars.discourse-cdn.com/v4/letter/j/c5a1d2/32.png) [@jgove](https://discourse.psychopy.org/u/jgove)\
**Post date:** [May 14, 2024, 1:02am UTC](https://discourse.psychopy.org/t/data-output-missing-data/40015/1 "2024-05-14T01:02:10Z")

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**OS** (e.g. Win10): Win11  
**PsychoPy version** (e.g. 1.84.x): 2023.2.1  
**Standard Standalone? (y/n)** Y

I have a memory experiment with images of objects. My routines contain text components, code, and image components surrounded by loops. I have added lines like: thisExp.addData(‘current\_file0’, current\_file0) within each image component, and for many of my variables the data output contains a list of the images presented within that block/loop, as it should, but for some of my loops the data output only contains one line when there were several images shown. Does anyone know why this might be happening?

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**Author:** ![wakecarter](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.psychopy.org/wakecarter/32/5753_2.png) [@wakecarter](https://discourse.psychopy.org/u/wakecarter)\
**Post date:** [May 14, 2024, 5:59am UTC](https://discourse.psychopy.org/t/data-output-missing-data/40015/2 "2024-05-14T05:59:31Z")

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Make sure your loops have “is trials” ticked if you want one data row per iteration.

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**Author:** ![jgove](https://avatars.discourse-cdn.com/v4/letter/j/c5a1d2/32.png) [@jgove](https://discourse.psychopy.org/u/jgove)\
**Post date:** [May 14, 2024, 12:46pm UTC](https://discourse.psychopy.org/t/data-output-missing-data/40015/3 "2024-05-14T12:46:30Z")

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Thank you so much!