TimeQuest .sdc constraints for EPCS (ALTASMI_PARALLEL megafunction)

When I use the "set_max_skew" like shown above I get:

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Warning: No path is found satisfying assignment "set_max_skew -from [get_clocks {clk_epcs}] -to [get_ports {*ALTERA_DCLK}] 1.000 ". This assignment will be ignored.

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When I remove the "set_max_skew" line I get:

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Unconstrained Output Port:

asmi_slave:asmi_inst|asmi:asmi_inst|asmi_altasmi_parallel_t852:asmi_altasmi_parallel_t852_component|cycloneii_asmiblock3~ALTERA_DCLK

No output delay, min/max delays, false-path exceptions, or max skew assignments found. This port has clock assignment.

Unconstrained Output Port Paths:

pll|altpll_component|auto_generated|pll1|clk[1]

No output delay, min/max delays, false-path exceptions, or max skew assignments found. This port has clock assignment.

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So how do I fix it ? Is it a bug in Quartus ?