Applet
I have just licensed the software but still see
the popup trial message.
solution - click here
I have the graphing applet implemented within
a dynamic page ( PHP, JSP or ASP) but the graph is not
displayed and the browser says "cannot find VbarchartApplet.class".
solution - click here
Servlet
I have implemented the graphing servlet as directed
but still no graph image appears within my web page.
solution - click here
The graph image produced is oversized and the
characters of the text elements are very large.
solution - click here
If you experience any problem or require help / advice
implementing this graphing function then please feel free
to contact us at Support.
I have just licensed the software but still see the
popup trial message.
Sometimes a browser will cache a jar file in order to
improve the page load speed on the next visit. Therefore
the most likely cause is that the your browser has cached
the trial version of the applet.
To remedy this simply clear your browser cache and restart
the browser. In 99% of cases this solves the problem -
if not then please contact us at - Support.
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I have the graphing applet implemented within a dynamic
page ( PHP, JSP or ASP) but the graph is not displayed and
the browser says "cannot find VbarchartApplet.class".
When a page is served via a dynamic server side script,
the document root of that page is not necessarily
the directory in which the page resides (as it is with
static html pages). In this case the browser is attempting
to locate the jar file in another directory (usually the
root of the server scripting language).
The solution is to add the "CODEBASE" parameter
to the applet tag. This will tell the browser exactly
where to locate the jar file. For example if you have
your page and jar file in the location http://www.yourdomain.com/graph/
then the CODEBASE parameter would be:-
CODEBASE="http://www.yourdomain.com/graph/"
and you full APPLET tag would be:-
<applet code="VbarchartApplet.class"
archive="Vbarchart.jar" codebase="http://www.yourdomain.com/graph/"
width="450" height="440" mayscript>
In addition any URL's you have specified within the configuration
parameters (eg. data files, image files etc) should be
Absolute (Full Path) URL's rather than Relative
URL's.
ie.
<PARAM name="chartproperties"
value="http://www.yourdomain.com/graph/barprops.txt">
rather than
<PARAM name="chartproperties"
value="barprops.txt">
If this does not solve the problem then please contact
us at - Support.
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I have implemented the graphing servlet as directed
but still no graph image appears within my web page.
With the servlet form of the graph there can be a number
of reasons why the graph image is failing to display.
The most common are:-
Servlet Engine not in operation on the Server
Double check your Servlet Engine is working correctly
and that the graph servlet has been placed in the correct
directory.
Further
Info.
Missing Graphics Environment
If you are running an MS Windows OS then this will not
be the problem.
If you are running UNIX or Linux then check that your
graphics environment has been implemented (usually X11)
and that your Servlet engine is aware of it and able
to use it.
Further
Info.
Error in the configuration data
Double check all URL's specified in the configuration
parameters. We suggest always using Absolute (Full
Path) URL's rather than Relative URL's. in
order to avoid any ambiguity.
To determine the cause the best place to look is the
Servlet Engines Error Log. The error message their should
provide a clue. If you are unsure of what the error message
is telling you then please feel free to send it to us
at - Support
and we will more than happy to help.
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The graph image produced is oversized and the characters
of the text elements are very large.
In the Servlet form of the graph the size of the image
produced is taken from the width and height specified
in the configuration file (not the IMG tag). If the parameters
are missing then the image produced defaults to 100 pixels
by 100 pixels. If the width and height specified in the
image tag are greater then the browser will "Stretch"
the image to fit - hence producing some very strange results.
The solution is to add the width and height parameters
to the configuration file and set the values to match
those of your <IMG> tag.
eg.
width: 450
height: 440
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