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   HTDP (Horizontal Time-Dependent Positioning)         
   SOFTWARE VERSION: 3.4.0   
   VERSION DATE:     October 12, 2021    

   AUTHORS: Richard Snay, Chris Pearson, Jarir Saleh,   
            and Michael Dennis                          

   Web: https://geodesy.noaa.gov/TOOLS/Htdp/Htdp.shtml  
   Email: ngs.cors.htdp@noaa.gov                        
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 This software incorporates numerical models that
 characterize continuous crustal motion as well as 
 the episodic motion associated with earthquakes.

 The User Guide contains additional information and a set
 of exercises to familiarize users with the software.
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 MAIN MENU:
    0... Exit software.
    1... Estimate horizontal displacements between two dates.
    2... Estimate horizontal velocities.
    3... Transform observations to a specified reference frame and/or date.
    4... Transform positions between reference frames and/or dates.
    5... Transform velocities between reference frames. 


 Problem with reading OPTION: ios =           -1
 ABNORMAL TERMINATION
 PLEASE CHECK YOUR INPUT FILE AND TRY AGAIN