System Messages - Alphabetical List *ACE Sight instance not found* (-775) Explanation: The index of the specified instance does not exist. User action: Correct the eV+ code. *Already attached to logical unit* (-515) Explanation: A program has executed more than one ATTACH instruction for a specific logical unit, without executing a DETACH in between. (The program is still attached to the logical unit after this error occurs.) User action: Check the program logic and remove redundant ATTACH instructions. *Ambiguous AUTO invalid* (-477) Explanation: When exiting from the program editor, eV+ has encountered an automatic variable with undetermined type.
That is, the system cannot determine if the variable is real- valued or a transformation. Automatic variables cannot be ambiguous, since their storage requirements must be known before they are referenced. User action: Include the REAL or LOC type specification parameter in the AUTO statement that declares the variable, or reference the variable in a program instruction in a manner that makes its type clear. *Ambiguous name* (-453) Explanation: The abbreviation used for the last command, instruction, or system-defined name was not long enough to identify the operation intended. User action: Reenter the last line, using a longer abbreviation. Are you sure (Y/N)? (10) Explanation:
The requested command has a significant effect on the state of the system, and eV+ wants to know if you really want it to happen. User action: To have eV+ continue, type y followed by a carriage return. An n followed by a carriage return or just a carriage return causes the command to be aborted. *Arithmetic overflow* (-409) Explanation: The result of a calculation was outside the allowable range for real variables or eV+ has encountered a number that is outside the allowed range for integers while converting a real-valued number to a decimal, hexadecimal, or octal integer, or logical value.
Logical values use 32-bit integers, but most program instructions that require integer arguments allow only 16-bit integers. Also, real variables can have only magnitudes in the range from about 5.4E-20 to 9.2E+18. eV+Language Reference Guide, v2.x, 18319-000 Rev A Page 587