heimdall print-pit --verbose results in the following error on a Galaxy S9:
Initialising protocol...
WARNING: Control transfer #1 failed. Result: -1
WARNING: Control transfer #2 failed. Result: -1
WARNING: Control transfer #3 failed. Result: -1
WARNING: Control transfer #4 failed. Result: -1
WARNING: Control transfer #5 failed. Result: -1
WARNING: Control transfer #6 failed. Result: -1
ERROR: Failed to send data: "ODIN"
Releasing device interface...
heimdall print-pit --verbose
results in the following error on a Galaxy S9: