Hello

I think I found a bug in the SOLVER application.

This bug is reproducible also in the HP 50g emulator.

My VERSION:

Version HP50-C

Revision #2.15

Copyright HP 2009

Description of the bug

1. Put an equation into the variable EQ (eg. COS(X)).

2. If the variable 'X' exists, purge it.

3. Enter the SOLVE/SOLVR menu.

At that point everything seems ok, the menu displaying two items: 'X' and 'EXPR='

4. Enter a real number into 'X' (ex: 2) and press 'EXPR='. You get -.4161...

5. Press the VAR key to return to your home directory. You see the 'X' variable created.

6. Return to the SOLVE/SOLVR menu. No problem, both items ('X' and 'EXPR=' are still visible)

7. Now enter the symbolic value '2*pi' (using the greek letter for pi) into 'X' and press 'EXPR='. You get 1.

8. Press the VAR key to return in you home directory.

9. Return back to the SOLVE/SOLVR menu.

SURPRISE!!! The 'X' variable is no more displayed and accessible...

If you want to have it displayed and accessible, you have to enter non symbolic value!

I guess it has been already noted by some... Anyone knows if this has been notified to HP?

Regards

François

*Edited: 20 Sept 2011, 6:13 a.m. *