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

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.


image

Thank you!

Hi,

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

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

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.

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.

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).

See section 6.3.1 in the current version of the tutorial:

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.
image


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