Multiple ways to do this. I would use a FeatureMerger. Can also be done using a ChangeDetector.

Please net me know if you need more explanation.

Thank you. FeatureMerger worked to some extent, however:

• Strings with differences in lowercase/uppercase letters won't merge, is it possible to make the join condition case insensitive?
• When one or more of the join conditions isn't fulfilled, is there a way to list which Requestors/Suppliers (or which columns) didn't match?

• As far as I know, case sensitivity is not configurable. But I never use the newest versions so double check in a recent beta. Workaround could be to lowercase all input. If you don't want to change the original data, create a temp attribute with the lowercase values.
• Unmerged Requestors are requestors without supplier.
• Unused Suppliers are suppliers without requestor.

Unmerged Requestors and Unused Suppliers output the entire row with all input columns, so it doesn't tell me which requestor is missing a supplier. Unless I'm missing something? In the FeatureMerger Join On I input each Requestor(Excel column) that needs to match its corresponding Supplier(DWG attribute).

I misunderstood your question. The FeatureMerger can't do this.

The ChangeDetector is able to produce a list with changes, but then you need a unique ID for both sets, which is not the case if I understand correctly.

What I would do is reformat your data to rows with 3 columns:

FileName, AttributeName, AttributeValue.

This can be done with an AttributeExploder. Once you have this, you can then easily compare and find the differences.

If this is not what you need, please share some real sample data so we can try to reproduce what you are after. You can either paste some CSV in a comment or attach a .ffs file.

I have tried using the AttributeExploder first, but since the filename is one of the features the result is 2 columns (column name and row value) where filename occurs on 1 row for each file. When I input the reults into ChangeDetector I lose track of which file I'm checking for differences. How do I make sure each feature is connected to the correct filename in AttributeExploder?

Unfortunately I can't share actual data... Here's a screenshot, AttributeExploder result with 2 files checked:

My workspace:

Please create the sample data in Excel then. I need to have something I can read using workbench, build an example and upload it here. I do not want to invest time in creating sample data with the risk it is different from what you have, sorry.

I need 2 sheets, one which represents your excel file and one that represents the dwg output.

Understood, here are 2 sheets. To simplify I have used identical column names in both, and there are 2 differences in the date fields that I would like to filter out to a new excel file where it's possible to track which filenames contains differences. Thank you!

If the attribute Filename is unique, you can use the ChangeDetector to find the differences. See attached workspace.

This is exactly what I'm looking for. Thank you!

Cheers attaching sample data really helps with understanding the question.