Have you tried to install our ASN1C Eclipse plugin, or the ASN.1 Editor Plugin found on SourceForge, and seen this:
An error occurred while installing the items session context was:(profile=epp.package.java, phase=org.eclipse.equinox.internal.p2.engine.phases.Install, operand=null --> [R]net.sourceforge.asneditor 1.1.2, action=). Failed to prepare partial IU: [R]net.sourceforge.asneditor 1.1.2.
Then we have good news for you! This was a problem starting with Eclipse 4.4 and we've now updated our ASN1C Eclipse plugin to work with Eclipse 4.4+. Along with that, we've also repackaged the ASN.1 Editor Eclipse Plugin so it will work, too. Click on the "Eclipse Plugin" tab on our ASN1C product page for more information, or if you already know what you're doing, our Eclipse update site is http://www.obj-sys.com/eclipse.