08 Jul 2012 News for NTIA/ITS HF Propagation Models (WINDOWS version) 08 Jul 2012 1. A change was made to VOACAP to test a software change proposed by Alex Shovkoplyas. He believes there is an indexing error in the routines curmuf, seltxr, settxr, and sigdis. Using VOACAP or VOAAREA as normal, you will see no difference. To activate Alex's changes, change the data file: ..\database\version.w32 to read: Version 12.0708A The original version of the file reads: Version 12.0708W The "A" will trigger Alex's changes.