Due to a problem with the ALTLVDS_RX and ALTLVDS_TX MegaWizard™ GUIs in the Quartus® II software version 10.0 and 10.0 SP1, the MegaWizard GUI may not open if the local language setting of your machine is set to a non-English language.
To work around this problem, make sure the regional settings on your machine is set to English (<UK or United States>). This will not affect keyboard mappings, but will affect the default number separators:
- Open the Regional and Language Options menu from the Windows Control Panel.
- In the Standards and Formats box, select English (UK) or English (United States) from the drop down list.
- The “.” symbols change to “,” symbols in the Number section of the Samples window.
This problem is fixed beginning in the Quartus II software version 10.1.