I am downloading ACS 1 year data, and I have found that for the first ~900 records/observations, there is completely missing data for the last ~20 variables. The last half of the observations have data in those variables (obviously some data are missing as one would expect, but it’s not just blank for the last 20 or so columns). This missing data is systematic so it seems like it’s an issue either with the download or with data loss upon opening the file. I think it is with the download because the data is also missing when I open it in SAS. Has anyone had this issue? I’ve reduced the number of variables I include. The file size is 9.7 MB.