Okay. This morning I tried a different approach trying to isolate what may be causing the OPIM to crash, or more accurately fail to generate an Isometric. I decided to use the Manual selection in OPIM, keeping the Stop Signs and FFW's in place. Had the same errors. Removed FFW's, used Manual selection. Same result. Removed Stop Signs, used Manual Selection. OPIM generated the Isometrics. Although due to the amount of information on the Isometric sheet it was unreadable. Manually Selected the pipe spool at the top of the circuit. Isometric generated normally. Manually Selected the pipe spool at the bottom of the circuit. Isometric generated normally. Put Stop Signs back. OPIM failed. In the screenshot below I have indicated which is the Top and Bottom circuits. FFW's and Stop Signs indicated have been removed but need to be there for Iso generation What I have established is that there is nothing wrong with the actual piping model as the Iso generates normally when Stop Signs are removed. Troubling thing is that the same piping circuit was generating properly prior to some changes to the Regulating valves size. Now it just will not generate an Isometric(s).
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