You may have other issues if that actually how you export data with proc print. Numeric values that are reimported become character and depending on ranges of value may have things like  84.0 when the original value was 84.0. It appears that any value that would be right aligned and is shorter than the longest value, such as weight in the sashelp.class data set, where some are 150.0 any value less than 100 came back with that leading string. Removing ASIS=on does remove the the �z0: but the values are still character and not numeric when reimported into SAS using Proc Import.
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