1) create a new PfEPMA file
2) Analyse and add new sample
I think you mean open the Acquire! window and then click the New Sample button?
3) load file set and choose a previous analytical file.
4) add/remove standards and go ok.
Just FYI, there is no need to "Add/Remove Standards" if you are loading a File Setup from a previous run. The software will automatically add all the standards you need to the current run (and optionally the standard intensities from that run as well).
5) note that the sample now specified is not your unknown but the last standard in your list.
As mentioned previously, this is a feature, not a bug.
![Tongue :P](https://probesoftware.com/smf/Smileys/default/tongue.gif)
6) add new sample - now, this one is called "wavescan sample" even though it is marked as an unknown.
Yes, I see this and will fix it ASAP.
Now if you use this set up in probe for image and select this unknown as the sample for quantification, it will not allow you to use it, because even though you specified unknown sample, it is logged in the .mdb as wavescan. If, however, you turn round and rename it, all is good. Why is an unknown being recorded as wavescan?
Again FYI, you can use any standard or unknown in your MDB file as the basis for x-ray map quantification in CalcImage so this should not present a problem. Yes, the app incorrectly *names* the new sample "wavescan sample", but as you say, it is actually an unknown, so just change the name and all is good.