where can I find compiling error notes explained?

[bship]

I am trying to compile a test program and the error comes up - *** ERROR 23 ***  [chpargu1]   NOTHING CONNECTED ON COMPONENT: {Hardware Output}, ENTRY A1
          MC50_10T_MC50_12T!TOP!Outputs!C1p31_DigOut!C1p31 (228,142)
1. What does this mean, I think my lines are all connected?
2. Where can I find an index of error message explanations?
Thanks

[hproffitt]

It means that pin 31 is not seeing a connection.  It has to have a constant T or F on it, or be connected to logic elsewhere in the program to supply the T/F to it.  If you go to "OUTPUTS", then the "PIN 31" page, you can do a 'view net' or trace the logic by hitting "v" and clicking on the wire.

[bship]

Thanks, I traced it back to my pages connection to the outputs page