Document is not getting generated after preview

[CaptainG]

Hello team,

I have selected document template and after preview i am getting below error and logs. Can someone please help with this. Its for ootb document template and as well as custom document template.
Error:

Logs:

Request : <sysid> failed with ' Conversion failed. Cannot invoke "java.io.ByteArrayOutputStream.toByteArray()" because "pdfOS" is null': no thrown error

[pr8172510]

Hi CaptainG,

 

1. Understanding the error

Error:

Conversion failed. Cannot invoke "java.io.ByteArrayOutputStream.toByteArray()" because "pdfOS" is null

This means:

• The PDF engine failed to generate output
• So the stream (pdfOS) was never initialized

---

2. Why this happens (most common causes)

 1. Missing / misconfigured PDF Generation Plugin

Check if required plugins are active:

• Document Generation
• PDF Generation (iText / DocGen related plugins)

Sometimes after upgrades or changes, dependencies break

---

 2. HTML in template is not valid

Even for OOTB templates, if you modified:

• HTML structure
• CSS
• Embedded scripts

It can break PDF rendering

Things to check:

• Unclosed tags
• Unsupported CSS
• Images / external references

---

3. Fonts / attachments issue

If template uses:

• Custom fonts
• Images

 And system cannot access them → PDF fails silently

---

4. Instance-level issue (very common)

This error is often seen when:

• PDF generation service is not responding properly
• Node/cache issue

Try:

• cache.do
• Switch node (if multi-node instance)

---

5. Template context / data issue

If preview works partially but fails on generate:

• Check:
  • Fields used in template
  • Null/invalid data

---

3. Quick validation steps

Try these to isolate:

1. Use completely OOTB template (no changes)
2. Generate for a simple record
3. Check:
   • Same error or not

 If still failing → platform issue
 If not → template issue

[snehithkumar]

Hi @pr8172510 ,

I have verified all the things, its completely OOTB template but still failing.

[Tanushree Maiti]

Hi @CaptainG 

Can you confirm whether your document template is published. 

[CaptainG]

Hi @Tanushree Maiti ,

Its published and its completely ootb template but still facing issue.