ERROR: Failed acquiring write lock: No locks available

Running on a small cluster with two nodes with centos 7. One node has a Nvidia K20 and the other a K80. I know these are are terrible for password cracking but this is the hardware config. The error I'm having is in regard to no locks being available. I've killed all hashcat instances with a kill -9. I've tried a clean installation of cuda and drivers. Also, hashcat runs perfectly fine on the node with the K20.
Below is the command and hashcat output:

./hashcat -m 500 -a 3 newMD5.2.txt

hashcat (v3.00-69-g804ee28) starting...
OpenCL Platform #1: NVIDIA Corporation
======================================
- Device #1: Tesla K80, 3051/12205 MB allocatable, 13MCU
- Device #2: Tesla K80, 3051/12205 MB allocatable, 13MCU

WARN: nvmlDeviceGetFanSpeed() 3 Not Supported

WARN: nvmlDeviceGetFanSpeed() 3 Not Supported

Hashes: 29387 hashes; 29387 unique digests, 29387 unique salts
Bitmaps: 16 bits, 65536 entries, 0x0000ffff mask, 262144 bytes, 5/13 rotates
Applicable Optimizers:
* Zero-Byte
* Brute-Force
Watchdog: Temperature abort trigger set to 90c
Watchdog: Temperature retain trigger set to 75c

- Device #1: Kernel m00500.fc523c2d.kernel not found in cache! Building may take a while...


ERROR: Failed acquiring write lock: No locks available