In the first post in this thread, you showed three lines from an XML file containing a single <jvmEntries> tag with its options. But, the code you showed us in the third post in this thread only works if that entire tag is contained on a single line (not on three lines). Is that tag on three lines or on one line?

Will the strings initialHeapSize and maximumHeapSize immediately followed by zero or more spaces immediately followed by an equal sign ever appear in your XML file outside of the <jvmEntries> tag?

You are performing a case-insensitive search for the tag jvmEntries, do we also need to search for initialHeapSize and maximumHeapSize without regard to case, or are those strings always presented exactly as shown?