Parameter alpha must not be null

Here should go questions about transforming XML with XSLT and FOP.
shudson310
Posts: 120
Location: USA

Parameter alpha must not be null

Thu Dec 17, 2015 2:47 am

I just got <oXygen/> XML Editor 17.1, build 2015111718 and trying to run the default DITA MAP PDF transform scenario out of the box. It is failing with:

[fop] [ERROR] Anttask - Error rendering fo file: C:\htdocs\dita\DITAExplained\temp\pdf\oxygen_dita_temp\topic.fo <org.apache.fop.apps.FOPException: Parameter alpha must not be null

This is on Win 7 64-bit. I've not seen this error before, and usually the OOB scenarios work just fine.

Any ideas?

Thanks,

--Scott
radu_pisoi
Posts: 327
Location: Craiova

Re: Parameter alpha must not be null

Thu Dec 17, 2015 4:47 pm

Hi,

This problem is related to the Apache FOP processor which tries to embed an image in the constructed PDF and fails to retrieve its alpha channel.

Usually such issues are resolved by finding the problem image and re-saving it with different alpha settings.
See: http://comments.gmane.org/gmane.text.xml.fop.user/31508
Radu Pisoi
<oXygen/> XML Editor, Schema Editor and XSLT Editor/Debugger
http://www.oxygenxml.com
shudson310
Posts: 120
Location: USA

Re: Parameter alpha must not be null

Thu Dec 17, 2015 8:13 pm

Flattening the image in GIMP and re-exporting seems to have cleared up the problem.

As always, thanks for your quick and excellent support! oXygen truly has the best customer support in the industry.

Best regards,

--=Scott
Scott Hudson
Content Strategist
Jeppesen
Site: jeppesen.com

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