I get this:

botocore.errorfactory.ClientException: An error occurred (ClientException) when calling the SubmitJob operation: Fargate resource requirements (1.00 vCPU, 50000 MiB) not valid.

with decorators like so:

@batch

@resources(memory=50000, cpu=1)

@step

does this indicate that I do not have rights to request such resources?

AWS only allows for limited set of memory values (and associated VCPUs) for Fargate -

value = 512
VCPU = 0.25

value = 1024
VCPU = 0.25 or 0.5

value = 2048
VCPU = 0.25, 0.5, or 1

value = 3072
VCPU = 0.5, or 1

value = 4096
VCPU = 0.5, 1, or 2

value = 5120, 6144, or 7168
VCPU = 1 or 2

value = 8192
VCPU = 1, 2, or 4

value = 9216, 10240, 11264, 12288, 13312, 14336, or 15360
VCPU = 2 or 4

value = 16384
VCPU = 2, 4, or 8

value = 17408, 18432, 19456, 21504, 22528, 23552, 25600, 26624, 27648, 29696, or 30720
VCPU = 4

value = 20480, 24576, or 28672
VCPU = 4 or 8

value = 36864, 45056, 53248, or 61440
VCPU = 8

value = 32768, 40960, 49152, or 57344
VCPU = 8 or 16

value = 65536, 73728, 81920, 90112, 98304, 106496, 114688, or 122880
VCPU = 16