As "SPPID_Can not do and Can do" mentioned: UN-needed OPC should be deleted into stockpile.
How to re-used OPC?
At first, Open a drawing that you're going to put OPC on. then click the stockpile sign.
Notice: pick up the OPC that can be used.OPC should always be paired. you need find two same number OPC in the stockpile. for example: 301.Off Drawing Instrument Connector. Don't pick the single number OPC.
left click the OPC sign in the stockpile. it won't work if you click the text.
Open another drawing that you want to connect with same OPC.
2. Clean deleted OPC in the drawing, get more paired OPC to be re-used.
For example: OPC 314, open drawing 17-xxx, if the OPC in the EDE shows green color, then delete it to the stockpile, not delete to drawings. then you will find the pair OPC 314 in the stockpile.
