Insert variable in shortcode

I'm trying to run a shortcode in my theme's single post page (single.php). Trying to set the dataset parameter to an entry ID which is stored in a post custom field. Following is my code:

<?php
$form_id = get_post_meta($post->ID, 'entry_ID' , true);
echo do_shortcode('[e2pdf-download id="3" button-title="Download the Proposal" dataset="' . $form_id . '"]');
?>

However, this is not working. The shortcode does work when I use a static entry ID number rather than the $form_id variable for dataset. Any suggestion how to get dataset variable to work?

Hi,

The shortcode looks okay however are you sure that form_id returns correct Entry ID and not Form ID? Can you check please with.

Can you check please which value you get via var_dump? as:

$form_id = get_post_meta($post->ID, 'entry_ID' , true);
var_dump($form_id);
die();

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The Entry ID stored in the variable was correct. However, I somehow missed in the shortcode that it should be id=2 rather than id=3. Was using the wrong pdf. It now displays the download link correctly in my theme. Thank you for your assistance! Excellent product.