InexactError() from time.jl

[huckl3b3rry87]

Hi, I am getting this error at startup

ERROR: LoadError: [ INFO] [1537486301.719604835, 0.371000000]: Lookup would require extrapolation into the past.  Requested time 0.100000000 but the earliest data is at time 0.168000000, when looking up transform from frame [velodyne_top_link] to frame [map]
InexactError()
Stacktrace:
 [1] _canonical_time(::Int64, ::Int64) at /home/mavs/.julia/v0.6/RobotOS/src/time.jl:52
 [2] RobotOS.Time(::Int64, ::Int64) at /home/mavs/.julia/v0.6/RobotOS/src/time.jl:22
 [3] convert(::Type{std_msgs.msg.Header}, ::PyCall.PyObject) at /home/mavs/.julia/v0.6/RobotOS/src/gentypes.jl:486 (repeats 2 times)
 [4] (::RobotOS.ServiceProxy{gazebo_msgs.srv.GetModelState})(::gazebo_msgs.srv.GetModelStateRequest) at /home/mavs/.julia/v0.6/RobotOS/src/services.jl:32
 [5] loop_straight_line(::RobotOS.ServiceProxy{gazebo_msgs.srv.SetModelState}, ::RobotOS.ServiceProxy{gazebo_msgs.srv.GetModelState}) at /home/mavs/MAVs/ros/src/models/gazebo/vehicle_description/move_vehicle.jl:48
 [6] main() at /home/mavs/MAVs/ros/src/models/gazebo/vehicle_description/move_vehicle.jl:205
 [7] include_from_node1(::String) at ./loading.jl:576
 [8] include(::String) at ./sysimg.jl:14
 [9] process_options(::Base.JLOptions) at ./client.jl:305
 [10] _start() at ./client.jl:371
while loading /home/mavs/MAVs/ros/src/models/gazebo/vehicle_description/move_vehicle.jl, in expression starting on line 212
[move_vehicle-8] process has died [pid 264, exit code 1, cmd /home/mavs/MAVs/ros/src/models/gazebo/vehicle_description/move_vehicle.jl __name:=move_vehicle __log:=/home/mavs/.ros/log/2df2eb38-bd2d-11e8-a1a3-fc15b4ebb208/move_vehicle-8.log].
log file: /home/mavs/.ros/log/2df2eb38-bd2d-11e8-a1a3-fc15b4ebb208/move_vehicle-8*.log

Is there any way that we can have a check for that so that if it does try to grab an earlier time it passes zero or something, just so that we can get started?

[jdlangs]

Do you have a code sample that can reproduce the InexactError? The error looks like the standard TF extrapolation error but I have no idea why that would create a problem in creating a Time instance.

[huckl3b3rry87]

@jdlangs thank you for the response. Unfortunately, I do not have a MWE yet, but this is the code
https://github.com/JuliaMPC/MAVs/blob/master/ros/src/models/gazebo/vehicle_description/move_vehicle.jl#L48

It is strange because this used to work just fine.