******************* This email originates from outside Imperial. Do not click on links and attachments unless you recognise the sender. If you trust the sender, add them to your safe senders list https://spam.ic.ac.uk/SpamConsole/Senders.aspx to disable email stamping for this address. ******************* Hello, I am trying to set up a Python filter in V5.9.0 to perform some on-the-fly calculations on a 2D domain. I have been able to extract the coordinates, the solution variables' datasets and now, I want to write the calculated quantity in a .fld/.chk/HDF5 file. Can this be done ? Any info will be helpful. I have looked into the Demos/Python folder of the source code but that wasn't of much help. Regards, Ishan PGR