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I am a novice in PLS, just received the activation key last week. Initially I key in my data using SPSS Ver 18. When I convert to cvs file, all my data previously stored under SPSS were automatically converted to PLS and override my previous file. When I run PLS, there is a problem of missing value, and I could no longer correct the value previously under SPSS data file. Even the data on my backup drives (USB) automatically transform to PLS. Does this mean I should re enter all the data again. Please help. Thanks.

When you conver things to csv and save things as csv file, your orignal SPSS file should be unaffected and can still be opened. Open the .spo file and not the .csv file when runnning SPSS.

Kind regards,
Christian Ringle

Thanks Dr.