The SOI console (oneclick.jnlp) for one SOI environment cannot be launched on a laptop where the SOI Console from another environment can be opened on the same laptop successfully.
 

The default max-heap-size parameter in the oneclick.jnlp file on the not working environment was changed to 2048. Default value is 512.

SOI 4.2

changed max-heap-size in oneclick.jnlp to from 2048 to 512

<j2se version="1.8.0_0+" href="http://java.sun.com/products/autodl/j2se" initial-heap-size="64m" max-heap-size="512m"/>