dlmwrite behaves randomly

[nicholst]

On Matlab R2019a I find dlmwrite on https://github.com/andersonwinkler/HCP/blob/master/share/hcp2blocks.m#L338 behaves erratically... subject id's are written as -1 or with nonsense values. When I manually try to write out the values again myself, e.g. with

[EB,tabout] = hcp2blocks(restrfile,blocksfile,true,[],true);
dlmwrite('AnotherTry.csv',tabout,'precision','%d')

it sometimes works, sometimes not; at first I thought changing '%d' to '%i' would fix it, but didn't consistently.

No idea what is going on, but I do note that the current (R2020a) documentation says that dlmwrite is deprecated for writematrix. Just want to lodge this behaviour in case others observe it.