Fix Column Names node error

[gcincilla]

Hi guys,

I'm trying to use the FixColumnNames node on Community nodes -> Rscripting->Utils to make my descriptor column names compatible with R environment. In the node I selected the option use strict name matching that use the method make.names of R to make R-compatible column names.

When I connect the node to my workflow the following error is triggered:

ERROR     Fix Column Names                   Configure failed (RuntimeException): org.rosuda.REngine.Rserve.RserveException: eval failed, request status: R parser: syntax error

I think Rserve should be correctly set, as I can use other R snippet nodes.

Please, do you have an idea why this error occurs?

Gio

[niederle]

Is it possible to attach the KNIME-table (does not need to contain data but the table specs should match). Or do you see this problem with every KNIME table?

[gcincilla]

Hi Niederle,

Thanks for your help. Sure, I attached an exemple of csv. If I simply read it and connect it to the node in the way I mentioned (with the Use strict name matching turned on) it gives me the error:

ERROR     Fix Column Names                   Execute failed: eval failed, request status: R parser: syntax error

If it's not possible to use the node with the Use strict name matching on, I will simply use it with this option turned off.

Thanks

• fix_col_name_test.csv

[niederle]

I could reproduce the error and put it into the issue list to fix it.

Thanks a lot for reporting!

[niederle]

The problem is the character ' in one of your columns.

I will try to allow this character for the next release as it is valid in KNIME.

[gcincilla]

Hi Niederle,

Thank you for trying to solve the issue for future versions and for the clarification! Unfortunately the ' character come from the CDK molecular properties node. Maybe we can contact to those guys in order to modify the name of the property "Lipinski's_Rule_of_Five". I guess the ' symbol can give problems also with other nodes.

Gio