Hi bambid
where exactly did you add the "_" ? can you show as screenshot ?
The error you posted earlier is a PHP error about loading a wrong class, something unrelated to the repeater fields names!!
Max, ChronoForms developer
ChronoMyAdmin: Database administration within Joomla, no phpMyAdmin needed.
ChronoMails simplifies Joomla email: newsletters, logging, and custom templates.
I'm not sure why would the _ underscore affect that error, it seems like a conflict with something else on your website as the repeater works fine for everyone else without the _
Regarding the loop, you can loop using HTML view with PHP enabled:
<?php foreach($this->data("fieldname") as $k => $value): ?>
Field1 = <?php echo $this->data("fieldname")[$k];<br>
Field2 = <?php echo $this->data("fieldname2")[$k];<br>
Field3 = <?php echo $this->data("fieldname3")[$k];<br>
<?php endforeach; ?>
place the HTML inside Output Buffer action (it will capture the output of the HTML into buffer) and use the {var:output_buffer_name} in your Email or TCPDF output
For the Upload inside the repeater, this is not yet supported, I will try to have a working fix in the next update
Max, ChronoForms developer
ChronoMyAdmin: Database administration within Joomla, no phpMyAdmin needed.
ChronoMails simplifies Joomla email: newsletters, logging, and custom templates.
Hi Bambid
The upload inside the Repeater should be working now, and in order to create a folder BEFORE the upload, you need to use the "Pre Submit" action inside the Load event and have a PHP inside it to create the folder for you
The Pre Submit action runs just after the submit is done and before the submit routine is processed, including the files uploads
it should look like this:

Max, ChronoForms developer
ChronoMyAdmin: Database administration within Joomla, no phpMyAdmin needed.
ChronoMails simplifies Joomla email: newsletters, logging, and custom templates.
Hi Bambid
What loop ? there are no loops in your images
if you mean displaying the images uploaded in the repeater then you can have your loop inside an Output Buffer action then pass the buffer variable to the email or PDF action:
{var:output-buffer-name}
Max, ChronoForms developer
ChronoMyAdmin: Database administration within Joomla, no phpMyAdmin needed.
ChronoMails simplifies Joomla email: newsletters, logging, and custom templates.
Another Loop inside Output Buffer then you can use the buffer variable anywhere, in HTML, Email or TCPDF
Max, ChronoForms developer
ChronoMyAdmin: Database administration within Joomla, no phpMyAdmin needed.
ChronoMails simplifies Joomla email: newsletters, logging, and custom templates.