I'm receiving errors trying to read SAS datasets into base SAS 9.4 using the libname statement and data step. I have received different errors on separate runs of the same code, which I'll paste below. It's not the data itself because I've received these errors on a number of unrelated SAS datasets.   ERROR: File JDRF.ANALYSIS_3_2_17.DATA is damaged. I/O processing did not complete.   ERROR: Invalid header on file JDRF.ANALYSIS_3_2_17.DATA.   ERROR: Windows error code: 50 in hc_disk_normal_read for V:\research\Alwood\JDRF ACC\Mark Peakman Data\analysis_3_2_17.sas7bdat, The request is not supported. 85 data biomarkers; 86 set jdrf.analysis_3_2_17; ERROR: File JDRF.ANALYSIS_3_2_17.DATA is damaged. I/O processing did not complete.   An example of the code I'm using is below:   libname jdrf "V:\research\Alwood\JDRF ACC\Mark Peakman Data"; data biomarkers; set jdrf.analysis_3_2_17; run;   Any assistance in resolving this matter will be greatly appreciated! ... View more