# Scheduling fails with a “Error in \`\_tam\_isDataFrame\`(.) : It is not a data frame.” error

**URL:** <https://community.exploratory.io/t/scheduling-fails-with-a-error-in-tam-isdataframe-it-is-not-a-data-frame-error/3835>\
**Category:** Uncategorized\
**Created:** [December 13, 2024, 5:19pm UTC](https://community.exploratory.io/t/scheduling-fails-with-a-error-in-tam-isdataframe-it-is-not-a-data-frame-error/3835 "2024-12-13T17:19:57Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![user1](https://community.exploratory.io/user_avatar/community.exploratory.io/user1/32/11_2.png) [@user1](https://community.exploratory.io/u/user1)\
**Post date:** [December 13, 2024, 5:19pm UTC](https://community.exploratory.io/t/scheduling-fails-with-a-error-in-tam-isdataframe-it-is-not-a-data-frame-error/3835/1 "2024-12-13T17:19:57Z")

</div>

If scheduling fails with the error message:  
`Error in '_tam_isDataFrame(.)': It is not a data frame.`,  
this issue is likely caused by changes in the source data.

**Solution:**

1. Verify the data source. Ensure that the target data source (e.g., a database table, file, etc.) exists and is returning the correct data.
2. After fixing any issues with the data source, rerun the schedule to confirm that it works as expected.