Oh gosh Harry, E4 occlusions are quite hard to establish the reason for them. Accuchek advised me to change everything including the battery in the pump and all the connectors, although it doesn't say (I don't think), to do all of that in the training manual.
Myself and another person I know has also had a fiar share of occlusions recently, my most recent one whilst my mum on her first night staying with me when I did my evening meal bolus with all of us sat around at the table....it beeped at me 3 times telling me I had an occlusion. I turned all 3 warnings off, checked just my tubing was right, and it was and did another bolus without changing anything and it worked perfectly and continued to do so till the 4th day when I had to do a cartridge change.
Other times, my levels had gone up really high prior to the occlusion warning, and I have had to change everything.....and I have never found out the reasons for the occlusions!!!! Only that it wasn't due to a bad site.
It is really worrying when they occur, especially when you don't know the reasons for them occuring.
There are other accuchek combo users here, that may be able to give help on what they have found has caused their occlusions, but mine have really stumped me. I had 4 months without one, and then a month when they kept occuring.
You did the right thing. It sounds like you also have a great teacher too!! Bit worrying for Lily when her pump suddenly starts alarming in school! I hope her fellow classmates understood and that Lily handled it okay. What a worry!!!
Let us know how she got on....