HP 48gII - Manual (Page 713)

Page 21-64
J1 # 1.5 # 0.5 `
Enter parameters 1 1.5 0.5
[‘] @GLIS4 ` Enter the program name in level 1
„°LL @)@RUN@ @@DBG@ Start the debugger.
Use @SST↓@ to step into the program and see the detailed operation of each
command.
Errors and error trapping
The functions of the PRG/ERROR sub-menu provide ways to manipulate errors
in the calculator, and trap errors in programs. The PRG/ERROR sub-menu,
available through
„°LL@)ERROR@ , contains the following functions
and sub-menus:
DOERR
This function executes an user-define error, thus causing the calculator to
behave as if that particular error has occurred. The function can take as
argument either an integer number, a binary integer number, an error
message, or the number zero (0). For example, in RPN mode, entering
5` @DOERR, produces the following error message: Error: Memory Clear
If you enter #11h
` @DOERR, produces the following message: Error:
Undefined FPTR Name
If you enter “TRY AGAIN”
` @DOERR, produces the following message: TRY
AGAIN
Finally,
0` @DOERR, produces the message: Interrupted
ERRN
This function returns a number representing the most recent error. For
example, if you try
0Y$@ERRN, you get the number #305h. This is the
binary integer representing the error: Infinite Result