TypeError: Cannot read properties of null (reading 'FactoryTimestamp') about nightscout-librelink-up

[timoschlueter]

hi @dassystem, can you make sure you have current measurements in the LibreLink Up app? i have not come across this issue myself yet. :(

[dassystem]

Whether the application has fresh data from a client or not, the server should not crash. Not having data could have several reasons: A fresh setup, missing internet connection of the uploader, issues on the side of Abbots official servers… In these cases, certainly not the whole application should break.

Unfortunately I don't know javascript very well, but I assume that we need to check for null values when loading it to the variable in index.js line 186.

const measurementDate = getUtcDateFromString(glucoseMeasurement.FactoryTimestamp);

An additional try catch might solve it. Happy to test it.

[timoschlueter]

@dassystem is this still an issue with the latest version? I added a few improvements to the error handling.

[dassystem]

Hey @timoschlueter, thanks for the mention!

I'm now getting a error message in the log (which is correct!) and the application is not crashing anymore (which is even better!)

nightscout-libre-link    | 2022-06-14T13:11:48.104457492Z > [email protected] start
nightscout-libre-link    | 2022-06-14T13:11:48.104477066Z > node index.js
nightscout-libre-link    | 2022-06-14T13:20:00.425171582Z [info]: no authTicket.expires
nightscout-libre-link    | 2022-06-14T13:20:00.425530543Z [info]: renew token
nightscout-libre-link    | 2022-06-14T13:20:00.760973318Z [info]: Logged in to LibreLink Up
nightscout-libre-link    | 2022-06-14T13:20:00.954207820Z [info]: Found 1 LibreLink Up connection.
nightscout-libre-link    | 2022-06-14T13:20:00.955213701Z [info]: -> The following connection will be used: <MY-NAME> (Patient-ID: <MY-UUID>)
nightscout-libre-link    | 2022-06-14T13:20:01.130118050Z [info]: Received blood glucose measurement items
nightscout-libre-link    | 2022-06-14T13:20:01.132070664Z [error]: Error getting glucose measurements Cannot read properties of null (reading 'FactoryTimestamp')

So at least this unhappy-path is working as expected and this bug issue can be closed. Thank you!

[timoschlueter]

awesome! :)