Re: MPLAB X IDE 5.20 Debug issue
If you use SAM parts I really encourage you to use the latest MPLAB X version as SAM parts are only supported since v5.00 so I guess many incremental changes / additions / fixes are done in each MPLAB X version (for SAM parts).
The only software tool which prevents to can potentially prevent to compile is...the compiler...
MPLAB X v5.40 has some quirks because this is the first 64bits version AND also uses OpenJava instead of Oracle Java, but MPLAB X v5.35 should work.
Also use the latest XC32 version and Harmony version.
However, if you want to use an existing project application in Harmony, it is essential to download exactly the software modules/components which were used to build it