Date&Time Difference not working in Column List Loop

Hi @all,
I have to calculate Time-Differences (to current Timestamp) within a variing count of Columns. So I tried to do that within a Column List Loop.
But:
When I use the “Date&Time Difference” Node (putting Flow-Variable “currentColumnName” into “col1_select”) I’ve got an ArrayIndexOutOfBoundsException.
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Has anyone an idea?

Thx @all
Michael.

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Hi @MBoesing

I think this Looping over columns from the KNIME hub may be helpful.
gr. Hans

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Hi @HansS,
thanks for your suggestion - it works! The regex-Rename to a meta-column-name was the solution!!
bw,
Michael

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