User`s guide

When program execution stops at a breakpoint, you can use the debugger Ctrl+N command
to cancel the breakpoint at the instruction, or you can leave the breakpoint set. In either
case, you can type Ctrl+P when you are ready to have program execution resume.
NOTE: A BPT command with no parameters clears the breakpoints in all the programs in
the system memory (except those programs that are executing). Entering a BPT
command with no parameters in debug monitor mode clears breakpoints in the current
program.
Program Watchpoints
The V+ WATCH command attaches a watchpoint to a variable or user-specified expression.
When a watchpoint has been set, the specified variable or expression is examined before each
program instruction is executed by the task associated with the watchpoint. The value
determined is compared with the value recorded when the watchpoint was originally defined.
If the value has changed, the task is stopped and the old and new values are displayed.
NOTE: Processing watchpoints consumes a lot of execution time and can significantly
slow down program execution. Be sure to cancel all the watchpoints for an execution task
when you are finished using the task for debugging.
There is no shorthand debugger command for setting watchpoints, but WATCH commands
can be entered on the debugger command line.
The Program Debugger
V+Language User's Guide, v17.0
Page 96