IMU won't be added to graph

[Masoumeh]

hi,

after playing the bag file, i receive the following error:
error.png

why?!

[matlabbe]

What is the frequency of the imu topic? The warning is coming from here: https://github.com/introlab/rtabmap_ros/blob/23c06875b9369988a2815edb915cd1eade85031a/src/CoreWrapper.cpp#L2017-L2045

We assume that imu are published faster than images/scans so that the transform exist at the timestamp of the image/scan.