Compiling designs targeting Stratix IV GT devices in downbonded packages fails with the error "The transceiver block has no associated PCI Express hard IP block."

For designs that target Stratix® IV GT devices in downbonded packages, the Quartus® II software version 10.0 incorrectly places PCI Express hard IP block at the bottom transceiver block, which does not have a hard IP block attached to it. Compilation of the design fails with a message similar to the following:

Error: Can’t assign I/O pad <“pad name”> to <pin name> because this causes failure in the placement of the other atoms in its associated channel.

Error: The transceiver block has no associated PCI Express hard IP block.

To work around this problem, upgrade to the Quartus II software version 10.0 SP1.

This issue is fixed beginning with the Quartus II software version 10.0 SP1.