Code 842: SUB PROGRAM NESTING EXCEEDED

Type of error: B — Registered data (the program or tool data includes an error) Stopped status: I — Reset stop Clearing procedure: O — Eliminate cause -> press reset key Display colour: Red On-screen parameters (shown in parentheses): WNo., NNo., BNo. Cause: 1. The total number of sequential calls of subprogram has exceeded eight. 2. Executing a program that includes an “M99” command has been attempted in the direct operation mode of HD, IC memory card or the Ethernet. 3. Invoking a program stored within the HD, IC memory card or the host has been attempted from the HD, IC memory card or the host. Action: 1. Check the number of subprogram calls, and correct the program so that the number of calls does not exceed eight. 2. Do not include an “M99” command in the main program to be executed in the direct operation mode. 3. Do not invoke any subprograms of the HD, IC memory card or host from the main program of the HD, IC memory card or the host.