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Java 1.5 - 1.7 and JNLP

Hello,
Here's the situation, we have two applications; one runs with Java 1.5 and other with 1.6.  At the moment, I have 1.5 and 1.6 installed and both of these applications start.  When I install Java 1.7, then the application that needs 1.6 does not run.  I did not test to see if the 1.5 app starts when 1.7 was installed.
I'm not the developer, and I don't know the connection between Java 1.7 and JNLP relative to our applications, but this is the problem;  When I have Java 1.7 installed the application which uses Java 1.6 does not start.  The javaws stopped at the "app.jnlp"  My question is; what might be the problem.  I realize that I have not provided enough information, yet I am looking for a point to start, moving toward a solution.  I'm now trying to get a hold of the various jnlp files that are used.
My other question is; is there a way of inserting "breakpoints" into the jnlp files?
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chima
Asked:
chima
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1 Solution
 
Ravi KallaTechnology LeadCommented:
One quick solution for this would be to install all JREs(1.5, 1.6 & 1.7) and point your application to the corresponding JRE during application startup.
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chimaAuthor Commented:
Ravi, this is true, but it be nice for this selection to be done automatically.
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chimaAuthor Commented:
Might this error message be helpful:
#### Java Web Start Error:
#### Missing required Permissions manifest attribute in main jar: http://jlvqaappm:8180/tiger-qa/lib/Tiger-Desktop_obfs.jar
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Ravi KallaTechnology LeadCommented:
There seem to be a security enhancement starting from Java7 update 51.

Please refer below link for reference -

http://stackoverflow.com/questions/21404830/securityexception-during-executing-jnlp-file-missing-required-permissions-manif
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chimaAuthor Commented:
thanks
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