Both indicates that the produced textures simply result in 0 which is understood as no data by SNAP. So, unchecking this option should be the solution - I no longer think that it is a form of error (e.g. division by zero).
Hello @ABraun ,
I am using snaphu to derive connected components layer for SBAS analysis. When I terrain correct the product, anywhere with zeros on the connected components layer SNAP converts it in NaN values. I want to keep the zero values. Due to the fact that i have many layers, i do not want to manually un-click the no-Data Value Used for each layer.
So, i was looking for a way to automate this. I tried to use band maths writing the following expression: if layer==NaN then 0 else layer . It does not work. The NaN values remain NaN
Do you know if there is a way of converting NaN values into zeros without doing the manual work or a way where we force SNAP not to convert zeros into NaNs when applying terrain correction ?
thanks
My first guess would be opening the dim file in Notepad and replacing all corresponding lines with the correct flag by CTRL+H.
Better make a backup first 
You can change one band in SNAP and save it, then compare the difference in the metadata.
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Thank you for your reply, i will try that