Subregion - sketch errors

[kingjosiah]

When trying to refine a subregion sketch further to include more detail, I get an error stating "Constraints of the sketch defining the highlighted element cannot be satisfied". The "Show" button tells me nothing nor highlights the offending element.

Any clue what may cause an error like this? Are there limitations with respect to number of vertices in a subregion? The changes i'm making are rather simple in nature....only adding a small drop-off area to a road. The errors seem to increase the more info I add.

Thanks for any help you can provide....i'm at wits end.

- Jon

[luigi]

Is the highlighted element the subregion sketch? Have you tried, or are you trying to constrain the sketch lines to something outside of the sketch?
I would select all the lines of the subregion (Hightlight, press tab, then select) and click on move, select disjoin, then move 0' away, and the location of the sketch lines will remain, but if there was anything constraint, it will remove them.

Without seeing, or playing with the file, I can't think of anything else...good luck!


When trying to refine a subregion sketch further to include more detail, I get an error stating "Constraints of the sketch defining the highlighted element cannot be satisfied". The "Show" button tells me nothing nor highlights the offending element.

Any clue what may cause an error like this? Are there limitations with respect to number of vertices in a subregion? The changes i'm making are rather simple in nature....only adding a small drop-off area to a road. The errors seem to increase the more info I add.

Thanks for any help you can provide....i'm at wits end.

- Jon

[kingjosiah]

Luigi-

Please forgive my timeliness, or lack thereof. Been trying to get back sooner, but alas, time has slipped by. Thanks for the response. I was trying to get the file ready for posting but the size, even when stripped down to bare essentials, is nearly 10mb. As an aside, do you know what the posting limitations are? I should probably check the FAQs.

Anyway, I tried the suggestion but to no avail.

With respect to the constraints, I was simply 'tracing' lines of the imported site plan below to achieve the sidewalk bump-out but was continually presented with the nasty error message. I still had the same error msg even when i drew a rectangular bump-out from scratch without any pick-lines tracing. I am at a loss when trying to figure out what or what is not being constrained....only thing that comes to mind is the actual geometry of the toposurface (there are some odd deformations alongside the existing road, which in reality are not there....so much for that imported surveyor's dwg) The attached image helps visualize what I am discussing.

Since I can make this work by creating smaller adjacent subregions, the goal is to learn what limitations there are when drawing subregions rather than finding a fix.

Thanks again for your previous reply.

[luigi]

Hi!
So you have a grass topography, with a road subregion, and you are trying to add a grass island subregion?

Have you tried editing the road subregion to include the island border? I am assuming there is no pad in that area? If there is, it is possible that the pad is causing the topography to be a bit erratic, and that might be the culprit (I am just thinking of possible causes) Sometimes, it helps to add points to your main topography that are just outside your pad, so that the cut of the pad won't try to "modify" too much the triangulations of the surface. Sometimes having more points to the topography helps the automatic geometry creation.

In terms of limitations, it is hard to pinpoint...the more subregions are placed in a very irregular site causes the geometry to not necessarily be easily calculated...I am attaching a large complex site I did (3D view in Plan) which has many subregions, and certain areas of the topography are "cut" to have an underground space and tunnel....the topography is a bit irregular... http://forums.augi.com/attachment.php?attachmentid=20986&d=1142442899

If that link doesn't work, here is the post, to me it states it is post #49 of this link http://forums.augi.com/showthread.php?t=19372&pp=10&page=3

The strange thing is that the error you stated it gives you is a constraint error, not something else....and a constraint error tells me that something that the topography is conected to is being modified in a way that it can't keep the constraint... maybe you should select, in the project, all the topography, subregions and pads (and nothing else) and move "by disjoining" to a 0 distance.....

Sorry, but it is hard to think of other reasons why it might be behaving this way without being in the file....I often feel like my hands are tied when I am not in control of the mouse :)

Hopefully it evantually will work out for you....

Take care,

Luigi-

Please forgive my timeliness, or lack thereof. Been trying to get back sooner, but alas, time has slipped by. Thanks for the response. I was trying to get the file ready for posting but the size, even when stripped down to bare essentials, is nearly 10mb. As an aside, do you know what the posting limitations are? I should probably check the FAQs.

Anyway, I tried the suggestion but to no avail.

With respect to the constraints, I was simply 'tracing' lines of the imported site plan below to achieve the sidewalk bump-out but was continually presented with the nasty error message. I still had the same error msg even when i drew a rectangular bump-out from scratch without any pick-lines tracing. I am at a loss when trying to figure out what or what is not being constrained....only thing that comes to mind is the actual geometry of the toposurface (there are some odd deformations alongside the existing road, which in reality are not there....so much for that imported surveyor's dwg) The attached image helps visualize what I am discussing.

Since I can make this work by creating smaller adjacent subregions, the goal is to learn what limitations there are when drawing subregions rather than finding a fix.

Thanks again for your previous reply.