The question of Joiner node in the Lable-free quantification and identification workflow

[zero]

Hi,
I have a question of the Joiner node.
The setting in the Joiner I choose the RowID,then the node is ok.According the RowID ,combining the ConsenusTextReader and MzTabReader is meaning or not.
I choose”retention_time” and ”rt_cf,It is appears the error that Type mismatch found of Joining Column Pair “retention_time” and “rt_cf”.This causes an empty output table.
I choose the choose ”exp_mass_to_charge” and ”mz_cf” ,It is right.
Is it the number type error.

Thank you!

[jpfeuffer]

Hi,

where did you get this workflow version from?
This should be fixed in the newest versions already:

Tutorials/Workflows at master · OpenMS/Tutorials

[zero]

I use the OpenMS plugin in KNIME in Windows. The version is 2.6.0.

[jpfeuffer]

Yes, but where did you download the .knwf workflow? You should try to download the newest version.
You need a Split Collection node after MzTabExporter to make a Number our of the RT array column.

[zero]

@jpfeuffer

,but where did you download the .knwf workflow

I set the workflow according the handout, My KNIME is 4.3.3 and the OpenMS is 2.6.0.

This is the Joiner node error. The error hint I should change the column type of retention_time.
What should I do?
Type mismatch found of Joining Column Pair “retention_time” and “rt_cf”.This causes an empty output table.

[jpfeuffer]

You need a Split Collection node after MzTabExporter to make a Number our of the retention_time collection column.
Make sure to only keep the first resulting column (but in almost all cases there will only be one entry anyway).

[jpfeuffer]

See section 6.3.1 in the current version of the tutorial:

handout.pdf

[zero]

Thank you very much. I have deal with it.You are right. I add the node(Split Collection Column and column Rename) to the Workflow.But the handout doesn’t have the two nodes.

[jpfeuffer]

It is described in the text but not yet reflected in the pictures, you are right.