How to cleanse a system for a reinstall of Arduino IDE? - arduino

I am trying to reinstall the Arduino IDE on my computer (Win 10) which had earlier used the same Arduino IDE version 1.6.0 (portable). I am now facing the issue of opening the IDE even.
This problem started when i installed the version Arduino 1.8.1 (non-portable). For certain reasons i want both the versions on my computer now. I have uninstalled 1.8.1(non-portable) and have put the portable version 1.8.1 in appropriate file directories. 1.8.1 exe runs perfectly but 1.6.0 exe still doesnt. Are there any ways to do so?

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MikTex - application failed to start because no Qt platform plugin could be initialized

While the installation of MikTex is working without a problem, trying to run the GUI of MikTex creates the following error on Windows:
I never had this problem on any windows version except for 11 and installing qt by hand involves reqistering (or paying) for qt.
Is there a simpler solution to that error?
Should a version of qt not be installed with miktex?
(Reinstalling did not fix the issue)

ArrayFire OpenCL Issue

I have installed ArrayFire 3.8.0 using the binary installer as per the instructions mentioned in the documentation. All dependencies were installed before installing it. NVIDIA CUDA Toolkit 11.3 is also installed. Installation was successful.
To test the installation, I have also build the examples as mentioned in the guide. There was no error during the build process. CPU & CUDA builds are running fine but OpenCL samples are not running. When I execute ./helloworld_opencl example, nothing happens on terminal. No process is shown in top & nvidia-smi.
Please guide me what could be the issue here. Clinfo command is running fine. I am on Ubuntu 20.04.
Thanks

Aptana Studio 3.6.1 stand-alone version install error (Win XP and Win 7)

I have download Aptana Studio 3.6.1 stand-alone version and attempted to install in on two different computers. The first computer is a Windoxs XP, 32-bit. The second computer is a Windows 7, 64-bit. In each case, I get the same error message about 3-4 minutes into the install:
"Failed to correctly acquire installer_nodejs_windows.msi file: CRC error."
Any ideas on what I should try?
First I suggest you not to use Aptana Studio. It seems that developers are not actively developing it.
I had the same problem, but installing download nodejs solved my problem.
Happy Coding!

please help in configuring opencv 2.4.8 on qt(vs2012) on 64bit windows7

I have 64bit intel machine.
I am running windows 7 (64 bit) on this machine.
I have installed Visual Studio Ultimate 2012 on my machine.
I have installed Qt Creator 3.0.1 based on Qt 5.2.1 (MSVC 2010, 32bit)
I am not able to configure opencv 2.4.8 on this Qt on my machine.
I have tried many things but I am not able to get opencv 2.4.8 work on qt.
Please tell me the necessary steps.
Please note, I guess there is some twist because of my software versions e.g. 64 bit machine, opencv 2.4.8 and qt based on MSVC2010, but I am not sure.
Please..please..please help me.
Thank you in advance.
Are you failing to compile OpenCV, link it with your application or running your executable from Qt? Are you linking statically? The problems can be quite different.
If you are linking statically everything needs to be compiled with the same Microsoft Visual C++ compiler AFAIK [VC11 (2012) in your case]. OpenCV is Ok because they provide binaries for vc10 (VS2010), vc11 (VS2012) and vc12 (VS2013). For Qt itself download the version compiled against VS2012 available here.
If you are required to use Qt libraries compiled against vc10, then make sure you install the redistributables for Microsoft Visual C++ 2010 Redistributable Package (x86) and link your application dynamically. And of course, use Dependency Walker if you have problems with wrong DLLs.

Creating a binary dependant on Qt 5

I created a development environment with Fedora 18 and Qt 5
When I compile my app it will be 64 bit, and depend on Qt 5. After some research it seems that will be a problem since Centos 6.x is still dependong on Qt 4.6, and Centos 5.x is dependant on earlier Qt, and I'm guessin Ubuntu has its own package limitations.
Is there a "safe" version of Qt I can compile against to ensure it runs everywhere? If not, how can I expect customers to run my program?
If you want to target Linux, then I would recommend using Qt 4.8 (available on most of the Linux Distros), forget about Qt 5 for a year or so. Hardly any Linux distro other than Ubuntu 13.04 and above comes with Qt 5.
Secondly, as far as compiling is considered, if you wish to target Linux distros other than Ubuntu and Fedora than never use Ubuntu or Fedora for compilation. These are bleeding edge Linux distros which include new libraries without much testing. You will not only face the problem of old Qt versions in some Linux distros as you will face the bigger problem of glibc (C library). Make sure the Linux distro you use for compilation has a minimum possible glibc version for Qt 4.8, otherwise even if any Linux distro has Qt 4.8 installed, but has a lower version of glibc, you app still won't run. You can check out distrowatch.com to find out glibc and Qt versions for any Linux Distro
Example:
I compiled my app on Ubuntu 12.04, Qt 4.8.1 with glibc v 2.16 (perhaps). I got a bug report than application does not run on CrunchBang which also has Qt 4.8.1 available but since it is a Debian unstable Linux Distro it uses glibc v2.13. Since that day I always compile my application on CrunchBang (very lighweight, you can Virtual Box for this) and hardly some one complains now.
As far as CentOs is considered, you will need to recompile your code on CentOS.

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