When using the "line to pipe" command (PLANTCONVERTLINETOPIPE), I select the construction lines for the pipe to draw, after putting in the pipe it deletes the construction lines. Is there a setting so that these lines are not deleted.
Currently, there is no such system variable to control the lines never be erased.
The way I accomplish converting line to pipe and keeping construction lines is to draw all construction lines on a dedicated layer (ex. Pipe Construction). I then freeze the "pipe construction layer before starting the line to pipe command. I then just thaw the pipe construction layer. It sounds complicated but I have toolbar button programed with a macro to do everything in one click. I will paste my macro below for reference. Just create a new custom command and program to button.
<^C^C-layer;s;0;lo;pipe_construction;;select \plantconvertlinetopipe -layer;u;pipe_construction;s;pipe_construction;; >