Title: w3 cache + tcpdf-based plugin NOT compatible?
Last modified: January 15, 2017

---

# w3 cache + tcpdf-based plugin NOT compatible?

 *  [ohsassyfrassy](https://wordpress.org/support/users/ohsassyfrassy/)
 * (@ohsassyfrassy)
 * [9 years, 3 months ago](https://wordpress.org/support/topic/w3-cache-tcpdf-based-plugin-not-compatible/)
 * Hey !
 * I’m having troubles with W3 Cache and the tcpdf-based Plugin Woocommerce PDF 
   Vouchers. (which is supposed to do pretty much exactly what the name suggests)…
 * I always get the following error:
 * **TCPDF ERROR: Some data has already been output, can’t send PDF file**
 * – That does not occur when W3 Cache is turned off… any idea why – or which settings
   I am supposed to tweak with ?
 * Thanks alot in advance and best regards,
    Barbara

The topic ‘w3 cache + tcpdf-based plugin NOT compatible?’ is closed to new replies.

 * ![](https://ps.w.org/w3-total-cache/assets/icon-256x256.png?rev=1041806)
 * [W3 Total Cache](https://wordpress.org/plugins/w3-total-cache/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/w3-total-cache/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/w3-total-cache/)
 * [Active Topics](https://wordpress.org/support/plugin/w3-total-cache/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/w3-total-cache/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/w3-total-cache/reviews/)

## Tags

 * [pdf](https://wordpress.org/support/topic-tag/pdf/)

 * 0 replies
 * 1 participant
 * Last reply from: [ohsassyfrassy](https://wordpress.org/support/users/ohsassyfrassy/)
 * Last activity: [9 years, 3 months ago](https://wordpress.org/support/topic/w3-cache-tcpdf-based-plugin-not-compatible/)
 * Status: not resolved