# Troubleshooting: General

Issues

▪Some items in the EthoVision XT screen are missing

▪EthoVision XT does not start when I double-click the icon on the desktop

▪I cannot open an experiment

▪EthoVision XT crashes after opening an experiment

▪EthoVision XT hangs after creating a new experiment

▪I cannot create new experiments, or acquire data with EthoVision XT

▪Video and data seem out of sync

▪When I create a new DanioVision experiment with a template made with a previous EthoVision XT version, my trial control rule does not work

▪I get a message that a dll file is missing

▪I cannot work remotely with EthoVision XT

▪I get a message that the backup file cannot be created

▪After selecting Deep Learning in the Experiment Settings, the software becomes unresponsive

▪EthoVision XT crashes after opening a GLP log

▪The text and boxes look very small (Windows 11)

Some items in the EthoVision XT screen are missing

Check that the item is selected in the Show/Hide menu at the top-right corner of the EthoVision XT screen.

Menu items, items in the Experiment explorer, icons, etc. may become unavailable due to memory limitations. Use the data selection functions to reduce the amount of data to analyze.

EthoVision XT does not start when I double-click the icon on the desktop

This means that an instance of EthoVision XT is running in the background. This could be also due to removal of the dongle while EthoVision XT was running. Do one of the following:

▪Press Ctrl+Alt+Del and then click Task Manager. Click the Processes tab, select each instance of EthoVision XT and click End task.

▪Restart the computer and start EthoVision XT.

I cannot open an experiment

Experiment (in general)

▪This occurs when you try to open an experiment (File > Open) that is saved in a newer EthoVision XT version. Start that version and open the experiment.

▪Another reason could be that the experiment contains files whose names include non-ASCII or special characters. Please use standard ASCII characters when creating backups and saving copies of experiments (Save As).

▪It may be that the experiment repository file (*.evxt) is corrupt. First, delete that file (though not permanently - just leave it in the recycle bin). Locate the file Restore.btn and rename this file as the file you have just deleted, including the extension *.evxt. Next, in EthoVision XT, open that repository file (*.evxt).

If none of the actions above solve the issue, contact Noldus Support.

Experiment from a backup

▪You get a message like Backup [name of backup file] could not be restored.

Probably the backup file is stored on a location for which you do not have write rights like a DVD or a network drive. Copy the backup to a location where you have full rights, and restore the experiment from that file.

▪You get a message like [name of backup file] is not a valid backup archive. (ID 10060).

Probably the backup is still in a zip folder after downloading (for example, My PC > Downloads > [folder name].zip). Extract the files to another folder. The backup should be outside zip folders.

Experiment from MyDocuments or Windows Explorer

Make sure that the MyDocuments is a mapped network drive.

If My Documents is on a non-mapped network drive (the file path shows no drive letter but \\computer\), you can open the experiment there by double-clicking its name (*.evxt), but it is not possible to open it by selecting File > Open.

EthoVision XT crashes after opening an experiment

This may occur if you open an EthoVision XT experiment and UltraVox XT 3 is open on the same PC.

Always follow this sequence of actions when working with UltraVox XT 3 and EthoVision XT:

Close UltraVox XT > Start EthoVision XT > Open the EthoVision XT experiment > Start UltraVox XT.

This issue does not occur if you use UltraVox XT 4.

EthoVision XT hangs after creating a new experiment

This may occur when the USB-IO box is connected to a USB port on a docking station or a USB hub. Some docks and hubs interfere with the signal between EthoVision and the hardware connected over USB.

Therefore, always connect the USB-IO box and other USB peripherals directly to the computer instead of through USB hubs or docking stations.

▪If you use a laptop and encounter issues, connect the USB-IO box on the other side of the machine.

▪If you use a desktop and encounter issues, connect the USB-IO box to the back side of the machine.

Video and data seem out of sync

You can test a video source on timing. This can determine how accurate a camera is in combination with EthoVision XT and can in some cases explain synchronization problems.

To do so you can use the TestVideo utility software. Browse to my.noldus.com, log in or register, then select Downloads > EthoVision XT > Drivers and tools and download TestVideo. Copy the file TestVideo [version number].exe to a location on your EthoVision XT computer and run it.

important Only install and operate TestVideo when requested by Noldus Support.

When I create a new DanioVision experiment with a template made with a previous EthoVision XT version, my trial control rule does not work

This happens if you change the Trial Control Hardware Settings in the Experiment Settings. We recommend to create a new experiment in EthoVision XT 19 and use this as a template for new ones.

I get a message that a dll file is missing

When starting EthoVision the message appears: The program can’t start because api-ms-win-crt-heap-I1-1-0.dll is missing from your computer.

To solve the issue, do a Windows Update.

I cannot work remotely with EthoVision XT

You cannot control EthoVision XT from another computer through the Remote Desktop app. See Work with EthoVision XT remotely

See also Use a remote control to start and stop acquisition

I get a message that the backup file cannot be created

The backup is created anyway. You can restore the backup as usual.

The issue occurs when some files in the experiment folder are still opened. For example, one or more Excel export files. Close all files before creating a backup of an experiment.

After selecting Deep Learning in the Experiment Settings, the software becomes unresponsive

The first time the Deep learning function is selected, a model is created for the specific GPU installed on that computer. For some GPUs this process takes some time. During this time Ethovision will be unresponsive and appear to be crashed. If this is so in your case, wait until EthoVision will become responsive again. If the software no longer responds, contact Noldus.

The text and boxes in EthoVision XT look very small (Windows 11)

This occurs sometimes in Windows 11 at very high screen resolutions.

Do the following:

1.Right-click the shortcut of EthoVision XT on the desktop and select Properties.

2.Click the Compatibility tab.

3.Click Change high DPI settings.

4.Under High DPI scaling override, check the option Override high DPI scaling behavior and select System or System (Enhanced) from the list below.