[BUG] HP 50g SOLVE/SOLVR menu does not display unknown var Message #1 Posted by François Vanzeveren on 20 Sept 2011, 5:01 a.m.
Hello
I think I found a bug in the SOLVER application.
This bug is reproducible also in the HP 50g emulator.
My VERSION:
Version HP50C
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.
