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Peter Cornelissen wrote:

I have a project with numerous layers. On a line or polygon shapefile layer without style, it woks fine, however, if I use the same shapefile and it has style associated with it (once it has been saved), the vertex editor does not work. Reproducible on my project with all shapefiles.

I can't replicate here could you attach a sample project+data?

I've attached a LDF, hopefully that has all you need. I tried loading this into a new project and I still get the same problem.

Sorry, that's a bit over complicated, attached is a simplified version with the same shapefile but one with style the other without.

Peter Cornelissen wrote:

Sorry, that's a bit over complicated, attached is a simplified version with the same shapefile but one with style the other without.

hard to try replicate wothout the actual data, can you attach a simple project+sample data/style?

Hi

I've attached the necessary project files as requested, but what I have discovered by putting this example together is that it is the use of attributes in the rule-based style that causes the problem. I use attributes as I repeat the style dozens of times in the various Plans and do not want to have to have to create a different style file for each.

Thanks, Peter

for some reason in your project the decimal separator in the vertex editor shows as "," even if is all set to english in my pc (so to use the "." instead).

Using a locale that uses commas as separator is known to make the editor not working, see:

https://issues.qgis.org/issues/21867

If I understood this correctly, I had to change the QGIS locale by opening the Settings -> Options dialog and in the General tab 'Override system locale' and select English United Kingdom. I made the change, restarted QGIS. If that's the case, as far as I can tell the error is still there. Works fine without the attributes, but not with them. If there is anything else I am supposed to change, please let me know.

Peter Cornelissen wrote:

If I understood this correctly, I had to change the QGIS locale by opening the Settings -> Options dialog and in the General tab 'Override system locale' and select English United Kingdom. I made the change, restarted QGIS. If that's the case, as far as I can tell the error is still there. Works fine without the attributes, but not with them. If there is anything else I am supposed to change, please let me know.

do you still the comma as decimal separator in the vertex editor?

Sorry, I should have checked before, but the decimal separator is '.' (see attached) and as I hadn't checked before making the change, I reverted to system locale and that is also '.' (i.e. no sign of a comma). As I can't get the tool or editor to work on the style with attributes, I can't obviously see what the result is there. Unfortunately, I don't think this issue is not related to the system locale issue, it must be something to do with the use of the attribute in the style rule expression.