⚠️VERY IMPORTANT! Installation order:
There is one extremely important detail when installing ODE Master.

You must install the files in exactly this order:

Install ODM_CAS FIRST.

Only after ODM_CAS is already present on the calculator, install the ODE Master .hpappdir.

Correct order:

ODM_CAS → ODE Master .hpappdir

Do NOT install the .hpappdir first.

If the .hpappdir is transferred before ODM_CAS, the HP Prime may initialize the application before detecting the required CAS module.

When this happens, ODE Master may refuse to open and can appear to have a syntax or startup error.

Installing ODM_CAS first avoids this problem.



Firmware / software version:
ODE Master was tested on the latest beta version of the HP Prime firmware/software available during final development and release testing as august 16 2026.

Because ODE Master makes extensive use of PPL and CAS functionality, behavior may differ on older firmware revisions.

If you experience unexpected startup problems, CAS errors, crashes, strange UI behavior, or another issue that cannot be reproduced normally, one of the first things I recommend is updating your HP Prime to the latest firmware/software version available and testing ODE Master again.

UPDATE HERE UR HP PRIME: https://updates.moravia-consulting.com/beta.html