Evaluation Underflow Error

Owned by Perla Madrigal (Unlicensed)
Last updated: Apr 11, 2024 by Corey Boyles
2 min read

  1. Using an incomplete command line.

example:  P0=    (missing a value)

example:  INH 2-       correct would be INH -2  (waiting for input #2 to turn off)

example:  INH -24 (1.5      missing ")" to close the timeout.

 

  1. Using existing commands as DEFINE.

Aliases were added in 1.18.07. The following document addresses their use.

When using aliases, be careful not to use any aliases that are close to AcroBASIC commands. The #DEFINE statement will NOT give you an error on download and will be there when you issue the DEF query. The program lines that have that alias will not be properly stored and when you try to query these parameters, you will get errors. See example below. AMP and XAXIS are arguments for the CMTand CONFIG commands, respectively.

SYS>dim def20

SYS>#define AMP p6144

SYS>#define Xaxis p6145

SYS>def

#DEFINE AMP P6144

#DEFINE Xaxis P6145

SYS>?AMP

Evaluation underflow

SYS>?Xaxis

Evaluation underflow

 

What aliases will not work? Just type HELP at the command prompt. See example below (I bolded the items shown as examples above):

SYS>help

ACR9000 (c) 2003 by Parker Hannifin Corporation

Version 1.18.10 Update 4

Commands: ? ABS ACC ADC ADCX ALL ALM AMP ANG AS ATTACH AUT AXIS BACKUP BASE

BKL BLK BLM BREAK BRESET BSC CAM CAP CHECKSUM CIRCCW CIRCW CLEAR CLOCK CLOSE

CLR CLS CMT COM1 COM2 CONFIG CONTRAST COUNT CPU DAC DACSTEP DEC DEF DEFINE

DETACH DGAIN DIAG DIM DIN DIP DPCB DRIVE DST DTALK DWIDTH DWL DZL DZU ECHO

ELOAD ELSE ENC END ENDIF ENDP ERASE ERPMR ESAVE EXC F FBT FBVEL FEND FFACC

FFVC FFVEL FIFO FIRMWARE FLASH FLT FLZ FOR FOV FREQ FSTAT FVEL FWD FWIRE GAIN

GEAR GOSUB GOTO HALT HDW HELP HPOS HSEEK HSINT IDELAY IF IGAIN IHPOS ILIMIT

IMAGE INC INH INPUT INT INTCAP INVK IO IP IPB ITB IVEL JLM JOG JRK K KVF KVI

KVP LIMIT LIST LISTEN LOAD LOCK LOGGING LOOK LOPASS LRUN MASK MASTER MAX

MAXVEL MBUF MDI MEM MENU MIN MODE MOV MSEEK MULT NEG NEW NEXT NONE NORM NOTCH

NURB NURBEND OFF OFFSET ON OPEN OPS PARTNUMBER PASSWORD PAUSE PBOOT PERIOD

PGAIN PLC PLS POFF PON POS PPR PPU PRINT PROG PROGRAM PROM PST RANGE RANK

RATCH RATIO READ REBOOT REM REN RES RESUME RETURN REV ROTARY ROTATE ROV RPM

RUN SAMP SAVE SCALE SEG SET SHIFT SINE SKEW SLAVE SPLINE SRC STEP STEPPER STP

SYNC SYS TALKTO TANG TARC THEN TIMEOUT TLM TMOV TO TOV TRG TRGP TRJ TROFF

TRON UNLOCK UPGRADE USING VECDEF VECTOR VEL VER VPOS W WEND WHILE WIDTH XAXIS

XIO

Parametrics: + - * / ** << >> < = > <> <= >= ABSF ACOS ACOSH ACOT ACOTH AND

ASC ASIN ASINH ATAN ATANH CEIL CHR$ CNT COS COSH COT COTH CTD FLOOR GETCH

INKEY$ INSTR KBHIT KR LAT LCASE$ LD LEFT$ LEN LN LOG MID$ MOD NAND NOR NOT OR

OUT RIGHT$ RND ROUND SIN SINH SPACE$ SQRT STR$ STRING$ TAN TANH TIM TRUNC

UCASE$ VAL XNOR XOR

 

8/26/14jh