Decimal or dot as we sas programmers call that character, is used by the SAS system as a missing value. When you tell SAS to import the data starting at column 1, when SAS doesn't find data it puts the missing flag in its data vector. If you need to use column numbers (for what ever reason you may have) try increasing the column number. IN your example it looks like your data starts in column 7.
Hope this has helped you,
Klaz