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Valued Contributor III
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Working project now gives "PLL cannot be synthesized" error

I just re-installed 11.1sp2 and opened my qsys project and now I get the "PLL cannot be synthesized" error. It appears to be a bug because it says this for all DDR2 ALTMEMFPHY configurations. No setting seems to make it go away. (I've seen a similar megawizzard bug but the workaround for megawizzard doesn't seem to apply here.) Any experience with this??? 

 

Greg
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Valued Contributor III
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altera will likely tell you to try with the latest version of quartus

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Valued Contributor III
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Yeah, I'm sure they would. Unfortunately 12.1 seems to be giving people even more misery than 11.1. I'm re-installing from the web instead of an install file - the only difference between the last install and the previous one.

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