[Not Manifold]

I am with you on this one @Jpmreno   Just happened to me with 4.6.1 .  @burtoogle 's comment above may be true for some cases previous to this posting that are similar to this, but either not enough research was done before answering or there was none at all. 

My model was sliced without issue. When I multiplied the model to having 5 on the build plate, this "manifold" message came up. Also, I have printed this file many times in the past with the previous cura versions and never had this issue.

Looks like a 4.6.2 needs to be created.

Edit - Also, when looking for the "highlighted areas" there were none to be found after a quick examination.

[Cura running super slow on a really good computer]

On 9/2/2019 at 4:00 AM, nallath said:

It's not a general software bug, since that would never have cleared QA on our side. For me it takes less than 2 seconds for all settings to load on boot and drop down menus open in 100 ms or something like that. 

Nallath, how does this answer help to resolve the issue? Telling us how fast your software is running is not a means to an end for the person with the issue.  If I may, how about an answer like this-- Our QA department works diligently to remove any general software bugs, so that should not be the issue here. As a reference, if the software is running properly, you should see the settings load in around 2 seconds on boot and drops down menus open very quickly (100 ms or so)  

[Cura running super slow on a really good computer]

On 9/3/2019 at 11:52 AM, Nerfstrike said:

I think I figured it out. I was looking at some forums about internet slowing down cura, and apparently cura tries to connect to web printer servers like octoprint. I am on a large wireless network because I am a college student using dorm wifi, so Cura was trying to find all the wireless printers on the large server (there is none), thus slowing it down. I just went to the plugins and deleted the one that has to do with wireless printers. C:\Program Files\Ultimaker Cura 4.2\plugins and delete the one called UM3NetworkPrinting. That instantly fixed the problem, and I dont use wireless printers. If I ever do, I'll just reinstall cura or something to get all the proper network plugins back.

This does improve performance....thanks for your findings. It is troubling to me that default settings would cause an issue like this.