High memory mode removes the default restriction that prevents SystmOne using more system memory.
TPP advise they tried to roll this out as the default, but received complaints from organisations that were using sub-par equipment and felt forced to roll this change back.
Append normal shortcut with: -Xmx1024M -XSkipMemoryCheck
e.g: C:\Apps\Tpp\rungen.bat -Xmx1024M -XSkipMemoryCheck
