General Description: When opening Hardware Debugger the following message is given.
The logic allocation file (.ll file) for the specified design was not found. Debugging options will be disabled.
This message is given when (1)the <design>.ll file is missing or (2)the <design>.ll file has no probable points.
1) Missing .ll file -Make sure that the <design>.ll file is in the same directory as the <design>.bit file -Alternatively, put the <design>.ll file in the XACT/DATA directory and make sure that the XACT directory is included in the XACT variable and the PATH variable. -If a <design>.ll file does not exist create one by running "makebits -l <design>.lca" on the latest revision .lca file
2) .ll file has no probable points
Typically simple test designs will contain no probable points. The makebits program will generate probable points for FF outputs. To verify that no probable points exist, glance though the <design>.ll. If there are no lines that end with "Net=<netname>" then there are no probable points in the design. Putting FFs in the design will assure that there are some probable points. Most non-test design have some probable points, so this would not be an issue in more complex designs.
NOTE: If you are only dowloading the design, the .ll file is not necessary.