Problem: If you use Collections/Add to this collection/... to add a group of dated and undated .pos-files to any collection,
CDendro will use the first EndYear found (from an already dated .pos-file or from the collection itself and give it to all your
undated members so you then do not know which member was already dated or which was not.
A really simple remedy: See that all .pos-files which cannot be dated are anyhow given the date e.g. "2500" in CooRecorder before being saved!
Another remedy: When you have used CooRecorder to create a group containing several dated and undated .pos-files which you want to add to a collection
then always use a new (empty) target collection which you date to e.g. 2500 before you make the addition.
After addition using Collections/Add to this collection/... your undated .pos-files will pop up at 2500 while your dated .pos-files keep
their dated EndYear from CooRecorder.
You can use that collection as your target collection for more undated samples as long as that undated "2500-member" is still in place with its EndYear higher than any other dated member.
This also means: Never use Collections/Add to this collection/... to add undated .pos files to a collection containing only dated members!
A future remedy might be to automatically give all undated samples the EndYear 2500 (or alike) when they are added to any collection, though this requires an update of CDendro.