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I don't the reason of the expression error.

liming

The process XML "test5.xml" is below. The corresponding picture are as following,

Image: https://us.v-cdn.net/6030995/uploads/editor/uu/07fbf5evw8cn.png

When I run the process, I encounter an error as following,

Image: https://us.v-cdn.net/6030995/uploads/editor/2r/3sohnhlj49n2.png

How to fix the error

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Accepted answers

liming

Choose "Insert and evaluate" in "Insert macro". The corresponding is as following,

Image: https://us.v-cdn.net/6030995/uploads/editor/da/9q6zcfllo1kx.png

All comments

liming

Choose "Insert and evaluate" in "Insert macro". The corresponding is as following,

MartinLiebig

@liming,
to quickly explain it: Macros are by default Strings. This means:
id < %{outlier}
is a comparison between a string and an integer, which does not work.
Evaluate allows you to interpret the string. In your case, it gets parsed and thus works. Interestingly you can also do things like
id < eval("sqrt("+%{outlier}+")")
which makes eval super strong.

Best,
Martin

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