cfmail group attribute throws error

Question

I have a query which returns multiple results with just data in one column as different for a particular report number. I want to group the results for one report number and sen

Answer 1

I believe your actual problem is that you're using pound signs in the group attribute.

group="#investigation_id#" should be group="investigation_id"

--Edit--

This below answer is moot as the OP was misleading.

I think this is because you do not need cfoutput tags inside the cfmail tag. It's odd that it causes a mail error, though.

anyway...

I would try using cfsavecontent then output the variable in the cfmail.

<cfsavecontent variable = "mailBody">
    <cfoutput query="qryCorrectiveDueDate" group="investigation_id">
        <b>#action_who_email#</b><br>
        <cfoutput>
            Report ID: #report_id#</br>
            Report Number:  #report_number#</br>
            investigation id:   #investigation_id#</br>
            Action Who :#action_who#</br>
            Action What: #action_what#</br>
            Action When: #action_when#</br>
            Action type:#action_type#</br>
            Action Complete Date: #action_complete_date#</br></br>
        </cfoutput>
        </br> 
    </cfoutput>
</cfsavecontent>

<cfmail ...>
    #mailBody#
</cfmail>

Answer 2

Now that you've removed the hash tags, your issue is likely a missing cfoutput tag in the email. Similar to the group attribute of the cfoutput tag, you need another cfoutput tag to loop through the grouped records.

Tested on CF8 locally.

<cfmail query="q" group="field">
    <cfoutput>
        #field# - #field2#
    </cfoutput>
</cfmail>