Catch negative labels in sequences #637
Description
Feature Request
Hi Devs,
I am working with some 4DFlow sequences, and am using labels for ky,kz and cardiac phase/encoding.
I accidentally included negative labels for ky,kz while debugging, and this results in a crash after simulation as the ISMRMRD format uses uint16.
In this case it was not too much of a problem, as the simulation was only a few minutes long, but this could be annoying for users who want to perform very long simulations, as it happens after the simulation.
It would be great if simulate() checked the sequence for negative labels at the start, and threw an error prior to any significant computation being done. Additionally, maybe it would be useful if read_seq() also gave a warning when importing a sequence with negative labels.