how to get rawInterial data from xsens imu ?

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Hi,

I am trying to get the raw inertial data from the IMU without getting filtered from its internal filtering method. I am using lse_xsens_mti package for this purpose. There is a parameter

/lse_xsens_mti/xsens/rawInertial and i tried changing to true to get the raw intertial values.

But it is returning this error

[FATAL] [1396621280.829906875]: MTi -- Unable to set the output mode and settings

Any suggestions on solving this issue or other alternative to get the raw inertial values.