HP 48gII hp 48gII_user's manual_English_E_HDPMSG48E67_V2.pdf - Page 714

ERRM This function returns a character string representing the error message of the most recent error. For example, in Approx mode, if you try 0Y$@ERRM, you get the following string: "Infinite Result" ERR0 This function clears the last error number, so that, executing ERRN afterwards, in Approx mode, will return # 0h. For example, if you try 0Y$@ERR0 @ERRN, you get # 0h. Also, if you try 0Y$@ERR0 @ERRM, you get the empty string " ". LASTARG This function returns copies of the arguments of the command or function executed most recently. For example, in RPN mode, if you use: 3/2`, and then use function LASTARG (@LASTA), you will get the values 3 and 2 listed in the stack. Another example, in RPN mode, is the following: 5U`. Using LASTARG after these entries produces a 5. Sub-menu IFERR The @)IFERR sub-menu provides the following functions: These are the components of the IFERR ... THEN ... END construct or of the IFERR ... THEN ... ELSE ... END construct. Both logical constructs are used for trapping errors during program execution. Within the @)ERROR sub-menu, entering „@)IFERR, or ,@)IFERR, will place the IFERR structure components in the stack, ready for the user to fill the missing terms, i.e., The general form of the two error-trapping constructs is as follows: Page 21-65