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IT Support



Q. On what platforms can I use BioWin?

A. BioWin is a Windows application and runs on Windows XP/Vista/7/8.



Q. Are 64-bit versions of Windows supported?

A. Yes, BioWin is not a 64-bit application but it will install and run on 64-bit operating systems.



Q. What are the system requirements for BioWin?

A. BioWin System Requirements :

Operating system:
BioWin will run on any variety of Windows from Windows 98 and up. It also will run on Windows NT, Windows 2000 and Windows Vista

Recommend: Windows 7

Processor and Memory:
Processor equivalent to a Pentium IV @ 800 MHz with 128 MB RAM should be sufficient for running BioWin. Simulation speed is directly related to clock speed and system memory (memory is especially important for longer term dynamic simulations).

Recommend: 1GB memory is usually sufficient for most configurations (for very large, or very long term simulations more memory may be required). In the absence of memory limitations processor speed has the biggest impact on simulation speed – a general rule the faster the processor, the better.

BioWin does not take advantage of more than one core. However, a modern dual-core processor will still out perform an older single-core processor. If you are considering an upgrade, the dual-core processors from Intel and AMD are the best choice.”

Disk Space:
On most new machines disk space is unlikely to be a limitation – a full BioWin install takes less than 100 MB. It should be remembered however that long term simulations can generate lots of data, so BioWin files of these simulations can be quite large.

Screen Size:
BioWin displays some large dialog boxes, and consequently a minimum display resolution of 1024X786 is required.
Recommend: BioWin has extensive graphical output so higher resolution graphics cards and monitors are recommended. If graphical output is shown during the simulations then the simulation speed may also be affected by the graphics card speed and memory.

Reporting software:
BioWin can generate a report in Microsoft Word, however this feature requires Microsoft Word 2000 or higher.



Q. Can I use BioWin on an Apple computer running OS X?

A. BioWin does not natively run in OS X but it is possible to install and run BioWin in a supported version of Windows running in a virtual machine such as Parallels.



Q. When I start BioWin the following message appears:

“The program can’t start because HLVDD.DLL is missing from your computer. Try reinstalling the program to fix this problem.”

A. The Hardlock drivers were not installed successfully. To reinstall the drivers:

  1. Remove the Hardlock USB if it is connected to the computer.
  2. Click the Start button and click on Control Panel.
  3. Click on Programs and then Programs and Features.
  4. Select Hardlock Device Drivers and click the Uninstall/Change button. If the Hardlock drivers are not present proceed to Step 6.
  5. Click Next and then Finish to uninstall the Hardlock drivers.
  6. Download and run the Hardlock drivers.
  7. Insert the Hardlock USB into the computer.


Q. When I start BioWin the following message appears:

“Error : Invalid environment settings”

A. The environment variables that control the Hardlock drivers have not been set correctly. To check the environment variables:

  1. Click the Start button, right click on Computer and click Properties. Alternatively, in Windows Explorer, right click on Computer and click Properties.
  2. Click Advanced system settings followed by the Environment Variables… button.
  3. Search for environment variables beginning with HL_ or HLS_ and note their values.
  4. Download the Hardlock user manual and verify that the environment variables have been set correctly. Descriptions of the environment variables begin on Page 37.

In rare cases this error may occur even if no environment variables have been set. To solve this problem:

  1. Click the Start button, right click on Computer and click Properties. Alternatively, in Windows Explorer, right click on Computer and click Properties.
  2. Click Advanced system settings followed by the Environment Variables… button.
  3. Under User variables or System variables click the New… button.
  4. In the Variable name field type HL_SEARCH.
  5. For single license users, type usb in the Variable value field. For network license users, type ip in the Variable value field.
  6. Click OK on all open dialog boxes.


Q. When I start BioWin the following message appears:

“Error : Unable to find key OR all network licenses in use”

A. The Hardlock drivers cannot find the Hardlock USB or network license server.

For single license users

  1. Verify that the Hardlock USB has a solid red light at the tip.
  2. If not, remove the Hardlock USB from the computer.
  3. Click the Start button and click on Control Panel.
  4. Click on Programs and then Programs and Features.
  5. Select Hardlock Device Drivers and click the Uninstall/Change button. If the Hardlock drivers are not present proceed to Step 6.
  6. Click Next and then Finish to uninstall the Hardlock drivers.
  7. Download and run the Hardlock drivers.
  8. Insert the Hardlock USB into the computer.
  9. If the Hardlock USB does not have a solid red light at the tip it may indicate a physical problem with the key. Contact EnviroSim Associates Ltd. for further assistance.

For network license users

  1. Follow the steps above for single license users and verify that the Hardlock USB in the license server has a solid red light at the tip.
  2. Follow the BioWin network installation instructions.
  3. Ensure that port 3047 (tcp/udp) is not being blocked by a firewall.
  4. If the error persists, please contact EnviroSim Associates Ltd. for further assistance.


Q. After entering the activation code and clicking the Apply button, BioWin says the lease has been updated successfully but immediately closes.

A. The activation code has expired. Contact EnviroSim Associates Ltd. to obtain the current activation code for your key or renew the lease.

Q. I am trying to open a BioWin configuration and the following message appears:

“Error – Unable to create backup file”

A. BioWin creates a backup of the BioWin configuration when it is opened. The backup file is located in the same directory as where the BioWin configuration is located. This error will occur if BioWin does not have write access to that directory. If write access cannot be granted to that directory the BioWin configuration should be moved to a directory with read/write privileges.

The File|Open menu in BioWin automatically opens in the Data directory which by default is installed inside Program Files. Often write access is disabled in this directory. To change the Data directory location:

  1. In Windows Explorer locate the Data directory.

In 32-bit versions of Windows the default directory is C:\Program Files\EnviroSim\BioWin X.Y\Data.

In 64-bit versions of Windows the default directory is C:\Program Files (x86)\EnviroSim\BioWin X.Y\Data.

Where X.Y is the version of BioWin that is installed.

  1. Copy the Data directory to a location that has read/write privileges.
  2. Start BioWin.
  3. Go to the Tools|Customize menu and click the File locations tab.
  4. Select Data files and click the Modify location … button.
  5. Find and select the Data directory that was copied in Step 1 and click OK.
  6. Click the Close button.
  7. Restart BioWin.


Q. I am trying to open a BioWin configuration and the following message appears:

“This file was generated using a newer version of BioWin. This version of BioWin can only open files generated in version X.Y, or an older version.”

A. BioWin must be updated in order to open the BioWin configuration. To update BioWin:

For BioWin 3.1 users

  1. Download the latest version of BioWin 3.1.
  2. Run the file downloaded above and follow the instructions to update BioWin.

For BioWin 4.0 users

  1. Download the latest version of BioWin 4.0.
  2. Run the file downloaded above and follow the instructions to update BioWin.

Note: BioWin configuration files that are saved in a later version of BioWin may not be able to be opened in an earlier version. Backups are recommended.



Q. When I start BW Controller the following message appears:

“A COM error occurred”

A. BW Controller uses registry entries that require administrative privileges to create. These registry entries are normally created by the BioWin installer. There are two solutions if you encounter this problem:

  1. Download and install the latest version of BioWin 3.1.
  2. Run BioWin once with administrative privileges.
    • Locate the shortcut to start BioWin.
    • Right-click the shortcut and click Run as administrator.
    • Wait for BioWin to start and close it.

Note: It is only necessary to do this procedure once. Administrative privileges are not necessary once the registry entries have been installed.