Strange java error. What does it mean?

Question

"An error was encountered performing the requested operation:
no odjdbc11 in java.library path
vendor code 0"
Using latest version of SD, which works on some PCs but not on others. It does not matter what version of JRE is installed on the machines involved.

Answer 1

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Okay, then how does one discover what version of Oracle is installed?
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Post the results of SELECT * FROM V$VERSION after connecting to Oracle.
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We are all admittedly DUMB end-users here
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Not understanding something isn't being dumb but not 'trying' to understand something might be.
But you are still only providing mostly anecdotal evidence. To troubleshoot you have to provide facts; specific facts, not generalizations.
This statement is a gross generalization that is entirely lacking in facts
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it does not matter what version of SD or java is installed on their PC
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I seriously doubt if you know what versions are actually installed and/or which installed versions you are even using if multiple versions are installed.
To be factual you need to say precisely what versions of sql developer and java are installed.
This statement you made is totally off-base
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I have 1.5.0.12 and it works with every available version of SD out there.
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ABSOLUTELY WRONG! - get that notion out of your head!
Did you read the quote I provided from the Oracle sql developer download page? The version matters immensely.
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Oracle SQL Developer 3.1 is shipped with JDK1.6.0_11. However, you can connect to and use any JDK 1.6.0_11 or above.
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If Oracle says you need to use JDK 1.6.0_11 or above then don't use any other version period. It doesn't matter what you 'think' seems to work. If you don't use the correct versions you are guaranteed to have problems and some of those problems simply can't be fixed.
Your general statements about version are totally useless for troubleshooting purposes
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Using latest version of SD
We have made sure only one version of SD
it works with every available version of SD
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You have still not provided an actual version for sql developer that you are using that is causing a problem.
How can anyone try to reproduce your problem if they can't use the same exact version of software that you are using?
It is not believable that you have tried 'every available version of SD'. Stick to facts.
As for Java versions open a command prompt and post the results of
javac -version
java -versionThose commands will tell you what versions of Java compiler and JVM are actually being used by default.
For sql developer the GUI - help - About dialog box will display the version. There are actually THREE different executeables that are provided in the installation. Do you know which one you are actually launching?
One of the executeables should be run from a command prompt and it will leave the command window open so that you can see error messages and console output that would otherwise not display. Try this version and see if any other messages are displayed.
As for this
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"An error was encountered performing the requested operation:
no odjdbc11 in java.library path
vendor code 0"
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Are you absolutely certain you posted the EXACT message? There are no real references on the web to odjdbc11 but there are a ton of them to ocijdbc11.
This relates to connecting to Oracle using a TNS connection; that is using the thick OCI driver rather than the thin Java only driver.
To use the OCI driver you may need to have Oracle client installed on the pc. If you do a search for ocijdbc11 you will find many, many articles and this one is probably the one you should start with
http://mikesmithers.wordpress.com/2010/01/03/solved-%E2%80%93-the-mystery-of-sqldeveloper-and-the-missing-ocijdbc11/
The reference to Sue Harper's article is actually at this link. She is, or was, a sql developer product manager
http://www.oracle.com/technetwork/issue-archive/2008/08-may/o38sql-102034.html