Using filtfitl with a 1 x 1 dfsos or dffir filter

I am using the filter design tool to get the filter I want and then exporting the filter to the MATLAB workspace. The filter file type is 1 x 1 dfsos or dffir, depending on the type of filter I desgin.

When I try to use filtfilt with the designed filter, MATLAB gives me an error.

Error in filtdilt_test (line 84)

fil_s1=filtfilt(Hd1, s1);

where 'Hd1' is my filter and 's1' is the signal.

What am I doing wrong? What else do I need to include in the filtfilt syntax?

[Mathieu NOE]

hello

can you share the code and signals ?

tx