I2C Initialization fails

[starrobin34]

Hello everyone!

The Sparkfun 9doF Stick won't initialize via I2C throwing up this error:

[ 2464][E][Wire.cpp:422] beginTransmission(): could not acquire lock
[ 2470][E][Wire.cpp:448] endTransmission(): NULL TX buffer pointer
[ 2477][E][Wire.cpp:422] beginTransmission(): could not acquire lock
[ 2483][E][Wire.cpp:526] write(): NULL TX buffer pointer
[ 2488][E][Wire.cpp:448] endTransmission(): NULL TX buffer pointer
[ 2494][E][Wire.cpp:481] requestFrom(): NULL buffer pointer
[ 2500][E][Wire.cpp:557] read(): NULL RX buffer pointer
[ 2505][E][Wire.cpp:422] beginTransmission(): could not acquire lock
[ 2511][E][Wire.cpp:526] write(): NULL TX buffer pointer
[ 2516][E][Wire.cpp:448] endTransmission(): NULL TX buffer pointer
[ 2522][E][Wire.cpp:481] requestFrom(): NULL buffer pointer
[ 2528][E][Wire.cpp:557] read(): NULL RX buffer pointer
Failed to communicate with LSM9DS1.

I've double checked the wiring and when running an I2C scanner I get the address for the accelerometer (0x6B) but not the address for the Magnetometer.
I've tried:

1. Lowering clock speed
2. Manually transmitting
3. adding delays

Help is appreciated!

[edspark]

What micro-controller are you using?

Thanks!