CSV file locked after writetable

I'm saving a table d to DL.csv via writetable(d,'DL.csv');

My code creates/writes the csv file correctly but when I try to open the csv I get the message "DL.csv is locked for editing". Has anybody else seen this before and is there a better way to save the table to csv that avoids this issue? Thanks

[Walter Roberson]

Which version do you happen to be using? In R2017b the code invoked is toolbox/matlab/datatypes/@tabular/writeTextFile.m and that code uses fopen() and puts in an onCleanup to be sure that the file gets closed, so it shouldn't be left locked after the writetable() returns.