Does the template have Named ranges in it?

FME can write to named ranges - This can also be single cells I think. I think this should be pretty helpful in your case as you shouldn't need to worry about the row id when writing, although without seeing the data it's pretty hard to provide many tips.

https://community.safe.com/s/question/0D54Q000080hHoXSAU/excel-named-range-readwrite

It sounds like there are some issues with that method but it's probably the best option. You might have to experiment with various options in the writer and template to find something that works.

Good luck! Automation is fun

You can expose the xlsx_row_id attribute and use it as the Sheet name.

As for formatting the rest of your template, get familiarized with column and row id. I hope you have a header row in your original data.🙂

​Thanks @virtualcitymatt​ that's very helpful to know. The template does not have named ranges. But this is something that I could add...

Attached is an example of the source data. One row per survey and i've colour coded the attributes to match the required destination cells in the template (attached in the next comment). Depending on what the attribute value is, an 'x' is required to be put next to the matching value in the template. Does this help explain the issue?

This a snapshot of the template i am trying to populate with the data in the source example above. Notice the 'x' against a value in each category (located in an attribute in the source data).