Unclear error message

[rnjudge]

I am trying to validate a document that I believe should validate. I get the error:

$ java -jar spdx-tools-2.2.8-jar-with-dependencies.jar Verify /home/rose/ternenv/tern/ubuntu.spdx 
WARNING: sun.reflect.Reflection.getCallerClass is not supported. This will impact performance.
14:51:52.177 [main] ERROR org.apache.jena.riot - [line: 1, col: 1 ] Content is not allowed in prolog.
Unable to parse the file: File /home/rose/ternenv/tern/ubuntu.spdx is not a recognized RDF/XML or tag/value format. While verifying for Tag/Value format: Error converting tag/value to RDF/XML format: Invalid license expression.  Expecting more operands.. While verifying for RDF/XML format: [line: 1, col: 1 ] Content is not allowed in prolog.

How do I know which license expression the "invalid license expression" is referring to? Also.. what does "content not allowed in prolog" mean?

I attached the file in question (note the .txt file format was added only to upload the doc to this issue)
ubuntu.spdx.txt

[goneall]

@rnjudge - Try the tools-java version of the tools. I don't know if would be any better, but we're only fixing security issues in this version. If it has the same issue in tools-java, let me know and I'll take a look.

[rnjudge]

Thanks @goneall! I do get a slightly more clear error message but still not sure what "expecting more operands" means here:

Analysis exception processing SPDX file: Invalid license expression.  Expecting more operands.
License expression: 'LGPL-2.1+, GPL-2.0+, LGPL-2.0+'

[goneall]

@rnjudge From the message, it looks like there is a license expression which is using comma's which are not allowed. If these are conjunctive license sets, AND should be used. Disjunctive OR should be used.

Let me know if that correlates with what you see in the file you're trying to verify.

[rnjudge]

Thank you @goneall! I appreciate your help.