Make an email body with two-level Start statement

[dev2]

Hi there,

I would like to send an email based on two tables. First one is a list of headers, second one the attached details.
The purpose is to send a formatted invoice, with headers and details below.

I’m struggling about the correct statement, though I found a similar post without solution.
I deal with 4 tables:

• Quote: list of quotes
• QuoteHeaders: list of headers
• Quote Details: every specifications related to the quote header, such as products or services
• TableTestDevis: list of products and services

Here is my statement:

<<Start:[QuoteHeaders]>><<[Description]>>
<<Start:[Quote Details]>> <<TableTestDevis[Code].[Nom]>>
<<End>>
<<End>>

And here is a screenshot of the table I would like to display

For any reason I don’t understand, I get an error message. Here is the log:

Error: Workflow rule ‘Show me the Invoice!’ action ‘Action 1’ Body template. Expression ‘Start:[QuoteHeaders]’ is invalid due to: Unable to find table ‘START:’, did you mean ‘Quote’?.
Error: Workflow rule ‘Show me the Invoice!’ action ‘Action 1’ Body template. Expression ‘[Description]’ is invalid due to: Unable to find column ‘Description’.
Error: Workflow rule ‘Show me the Invoice!’ action ‘Action 1’ Body template. Expression ‘End’ is invalid due to: Expression refers to undefined field.",

As I understand it, it does not seem to catch the table “QuoteHeaders” (I checked the name).
Any clue ? Are my Start/End statement incorrect ?

Many thanks in advance