Index: trunk/BNC/src/bnchelp.html
===================================================================
--- trunk/BNC/src/bnchelp.html	(revision 4453)
+++ trunk/BNC/src/bnchelp.html	(revision 4455)
@@ -153,4 +153,8 @@
 <p><img src="IMG/screenshot09.png"/></p>
 <p><u>Figure 5:</u> Sections on BNC's main window.</p>
+
+<p>
+On all platforms running BNC requires graphics support even when using the program offline. Windows and Mac systems always support graphics. When using BNC in batch mode on Linux systems, you need to make sure that at least a virtual X-Server like 'Xvfb' is installed and the 'DISPLAY' variable is defined.
+</p>
 
 <p>
@@ -652,10 +656,10 @@
 If 'Edit/Concatenate' is selected, specifying the a path to output RINEX Observation file(s) and specifying a full path to output RINEX Navigation file(s) is mandatory.</p> 
 
-<p>
-If 'Analyze' is selected, specifying logfile(s) to output analysis results is mandatory.<br> 
-</p> 
-
 <p><img src="IMG/screenshot25.png"/></p>
 <p><u>Figure 8:</u> Example for RINEX file editing with BNC in Post Processing mode.</p>
+
+<p>
+If 'Analyze' is selected, specifying logfile(s) to output analysis results is mandatory.<br> 
+</p> 
 
 <p><img src="IMG/screenshot29.png"/></p>
@@ -2005,5 +2009,5 @@
 
 <p>
-Note that BNC outputs a complete list of 'Epoch Header Records' even if no 'Position and Clock Records' are available for certain epochs e.g. because of stream outages. Note further that the 'Number of Epochs' in the first SP3 header record may not be correct because that number is not available when the file is created.
+Note that BNC outputs a complete list of SP3 'Epoch Header Records' even if no 'Position and Clock Records' are available for certain epochs because of stream outages. Note further that the 'Number of Epochs' in the first SP3 header record may not be correct because that number is not available when the file is created. Depending on your processing software (e.g. Bernese GNSS Software, BSW) it could therefore be necessary to correct an incorrect 'Number of Epochs' in the file before you use in Post Processing. 
 </p>
 
@@ -2331,4 +2335,7 @@
 bnc.exe -nw
 </p>
+<p>
+BNC requires graphics support even when started with the '-nw' option. Windows and Mac systems always support graphics. On Linux systems you may need to make sure that at least a virtual X-Server like 'Xvfb' is installed and the 'DISPLAY' variable is defined.
+</p>
 
 <p><a name="post"><h4>3.19.2 File Mode - optional</h4></p>
@@ -2506,10 +2513,10 @@
 <tr>
 <td>May 2012 &nbsp;</td><td>Version 2.6 &nbsp;</td>
-<td>[ADD] Version 2.6 published</td>
+<td>[Add] Version 2.6 published</td>
 </tr>
 
 <tr>
-<td>Jul 2012 &nbsp;</td><td>Version 2.7 &nbsp;</td>
-<td>[Bug] Bug in L5 decoding fixed<br> [Bug] Bug in on-the-fly configuration fixed<br> [Add] Clock RINEX file header extended<br> [Add] Decoding/converting COMPASS and QZSS added<br> [Add] Work on RINEX v2 and v3 quality check started<br> [Mod] Source code completely re-arranged<br> [Add] QWT and QWTPOLAR graphics libraries added  <br> [Add] RINEX v2 and v3 quality check through multi-path analysis and sky plot</td>
+<td>Aug 2012 &nbsp;</td><td>Version 2.7 &nbsp;</td>
+<td>[Bug] Bug in L5 decoding fixed<br> [Bug] Bug in on-the-fly configuration fixed<br> [Add] Clock RINEX file header extended<br> [Add] Decoding/converting COMPASS and QZSS added<br> [Add] Work on RINEX v2 and v3 quality check started<br> [Mod] Source code completely re-arranged<br> [Add] QWT and QWTPOLAR graphics libraries added<br> [Add] RINEX v2 and v3 quality check through multi-path analysis and sky plot<br> [Bug] Short periodic outages in PPP time series when operated when 'Sync Corr' set to zero<br> [Add] Version 2.7 published</td>
 </tr>
 
