# Tables Module: is there a maximum table size?

**URL:** <https://discourse.slicer.org/t/tables-module-is-there-a-maximum-table-size/10679>\
**Category:** Development\
**Created:** [March 13, 2020, 6:39pm UTC](https://discourse.slicer.org/t/tables-module-is-there-a-maximum-table-size/10679 "2020-03-13T18:39:39Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![wieke.prummel](https://avatars.discourse-cdn.com/v4/letter/w/58956e/32.png) [@wieke.prummel](https://discourse.slicer.org/u/wieke.prummel)\
**Post date:** [March 13, 2020, 6:39pm UTC](https://discourse.slicer.org/t/tables-module-is-there-a-maximum-table-size/10679/1 "2020-03-13T18:39:39Z")

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Hi,

I have a question regarding the Tables Module.

I am trying to import an Excel File of size 78x78, but it only displays 78x64…  
At first I thought it was only a display default, but when I try to access the data I can’t seem to access all values after rows and columns 64. Is this supposed to happen?

Thank you!

Wieke

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [March 18, 2020, 3:25am UTC](https://discourse.slicer.org/t/tables-module-is-there-a-maximum-table-size/10679/2 "2020-03-18T03:25:40Z")

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There is no limitation on the number of columns. Maybe your table did not have a unique name (value in first row) for each column.

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**Author:** ![wieke.prummel](https://avatars.discourse-cdn.com/v4/letter/w/58956e/32.png) [@wieke.prummel](https://discourse.slicer.org/u/wieke.prummel)\
**Post date:** [March 23, 2020, 7:26pm UTC](https://discourse.slicer.org/t/tables-module-is-there-a-maximum-table-size/10679/3 "2020-03-23T19:26:00Z")

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Thank you very much! That was indeed the issue!

Does this mean I always have to put a header (first row) by default in order to upload a matrix ?  
I added a header with strings and now all the data loads correctly.

Best,  
Wieke

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**Author:** ![lassoan](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/lassoan/32/13_2.png) [@lassoan](https://discourse.slicer.org/u/lassoan)\
**Post date:** [March 23, 2020, 7:29pm UTC](https://discourse.slicer.org/t/tables-module-is-there-a-maximum-table-size/10679/4 "2020-03-23T19:29:11Z")

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Yes, each column of the table must have a unique, non-empty name.