I've been bumping into a number of bugs in the Tops-20 DECnet implementation, some worse (like crashing with an ILMNRF and trashing parts of files) than others (simple job hangs and undocumented behavior.? Fortunately, I have been able to fix most of them; there's only one that I had to program around and another that I have yet to investigate. Meanwhile, I have a great deal of testing to do of the SETND2 code.? However, there are a number problems doing that, besides those alluded to, above.? For a number of cases, I have to start from a fresh boot with the node table completely empty.? There is no command to 'empty' or reset it.? So that's a pain.? Another thing you can't do is extract or inspect the full node population. It occurred to me that the data structures and associated node management routines that I wrote for the decisioning logic in SETND2 turn out to be fine for simulating the NODE% JSYS itself.? So what I do is fork an inferior version of SETND2 and trap the NODE% with a TFORK%.? It's starting to come together to the point where I need to model the actual rules used for DECnet node syntax. I know that a DECnet node can be a maximum of six characters long with only the numerals 0 (zero) to 9 (nine) and the letters A to Z.? However, I noticed some code in COMND% that checks to see that a node name has at least one alphabetic character in it.? I had never thought about that and was wondering what the actual standard says (or where that standard is). Does is matter where the letter is?? In other words, are five numeral zero's followed by the letter 'A' valid?? Is '00000A' OK?