Troubleshooting

The messages Partix shows when it refuses something, and what to do about each.

Adding and editing

"Already a line under that parent; edit its quantity instead.": The parent already has this item. A parent holds each item once, with a quantity. Change the existing line instead of adding a second one.
"A revision cannot contain itself.": You tried to add an item into itself. Not possible.
"Moving X there would create a cycle.": The target is somewhere inside the thing you are moving, so the move would make a loop. Adding an item higher up the same branch is fine. Only the things inside it are barred.
"This line belongs to a committed revision. Edit the staged draft instead.": You are in the Committed Area. Switch to the Staging Area.
I cannot edit the part number, version or revision.: That is correct; they are locked everywhere. Identity is assigned at commit and fixed by every line pointing at the item. Change it in commit review instead.
I cannot type a cost on an assembly.: An assembly's cost is always the sum of its lines. Edit the price on the parts inside it.

Nothing appears when I search for a part.: Part search starts at two characters. Try a longer term, or search by CPN or description instead of the manufacturer number.
An item I expected is missing from the picker.: Items that would create a loop are filtered out, so you cannot pick an invalid parent. Check whether it is already inside the assembly you are adding to.

"Nothing to commit.": No item in the tree has unreleased changes. Edit something in the Staging Area first.
"N item(s) need a release choice; the tree changed since this was loaded.": Someone edited the BOM while your commit review was open. Reload the page and review again. Partix will not release a plan that no longer matches the tree.
"X has never been numbered — pick a numbering subcategory for it.": A first-ever commit needs to know which family the part number comes from. Set it on the item, or choose it in commit review.
"X has never been released — its first commit takes v0.1.0, not a new version.": A first release keeps the version the item was created at. Switch that row to Revision.
"prefix-00042 was taken while this was open.": Somebody else was given that number between your review loading and your commit. Reload and commit again, and the next number will be used.
Revision is greyed out on a row.: Something inside it took a new part number, so this item has to take a version too. Find the row further down the plan that started it. See Revision or version.
I cannot remove a Forced row from the commit.: That is intended. Its contents changed, so the record has to be issued again.

A recipient says the link does not work.: It has expired or been revoked. Links are short-lived by design, so create a new one.
Costs are missing from a shared page.: Include costs was off. Costs are stripped before the page is sent, so an existing link cannot be changed to show them. Create a new link with the option on.

Note what you were doing, the product and the item, and the exact message.

Send that to your Partix contact. The wording of the message points straight at the rule that stopped you.