Move too far and this error is generated, the number seems to represent a position that no longer exists (-1 if you are moving up the way).
If you’ve created a new style, you may find it has dissappeared.
Continuing working may make the error recur. Save project
Data sets can be quite simple, but in most cases will include one or more of the following
Vector data
depending on where the data were sourced you may have a collection of other files. Do not edit these or try to open them.
Raster Data
Again there may be a guddle of files in addition to these. I most cases they do no harm, so leave them alone.
In addition to the basic data files, there may be project files:
When you make a map, for printing or web publication you may want a legend and a key. In Map Maker this information is stored separately. Template files (for printing) are also stored separately.
It is therefore important that you keep your own project data well-organised. Try and keep all the files you are creating in your own personal space or you may find it gets abused by someone else sharing the same data sets.
You may also create a number of working files when making maps from scratch or annotating maps. When using Map Maker it is wise to save working copies frequently and incrementally. In other words using a version number to create a new copy every so often or on every save, if you are really paranoid. This should be a feature really and there should be an decent layer save function.
Map Maker will handle fairly large data sets, but there are a instances when it has a tendency to hang.
Too many layers
If you are working with many layers, try clearing any layers you do not need. Try also using the drop-in drop out functions, to show layers at the appropriate map scale.
When you try to load a big .shp file the timer never stops, OS Master Map for example.
We have created a .dra of OS Master Map which seems to overcome the hanging problems.
To create a .dra from a .shp use the UTILITIES > VECTOR menus to import the file and save it as .dra
We are using a variety of tools including:
Windows tools like
Arc GIS Explorer Java to view and query maps (EASY TO USE)
Tatuk GIS viewer – to view and query maps (EASY TO USE)
Map Maker Pro and Gratis – to print maps, collect new data and create maps and perform complex spatial analyses (viewer and elementary are EASY TO USE- full version DIFFICULT TO USE)
Online tools
Google Maps
UMapper
Bing etc.
Check if there is a pattern, does it occur every time you perform a particular operation? Is it intermittent? Does it persist after a fresh start?
For example, deleting styles in a range in Project Style management consistently gives this error. It is most likely a Map Maker bug.
If the problem recurs persistently, but there is no pattern and restarting Map Maker doesn’t work, try turning your computer off for a minute and restart it again.
Check that you are not trying to do something silly (like loading a project from a different application).
If that doesn’t seem to fix it, try simplifying your project – have you got a guddle of data layers that you don’t really need?
If possible, try re-creating your project bringing in your data, any .tif layers etc. and refreshing your styles.
Finally it could require re-installation of the Map Maker program, or possibly an update to the Windows operating system.