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Created Symbol in Xilinx ISE Schematic editor Error NgdBuild:604

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3BABY

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Hi All

would anyone be able to help me out, or point me in the right direction of some documentation for this, i have searched the web and read through xilinx documents but cant seem to find an answer:

i have a project for targer XC9500 series CPLD, has top level shematic and a pin.ucf file. in order not to clutter up my only schematic i opened/created a new .sch file (test1.sch) and built some logic (PISO shift register) in it, named the I/O lines, i have created a symbol (called it "PISO") and attached it to this schematic. everything ok. i have created an library and included this symbol. Now, i have added this symbol "PISO" to my schematic in my project and wired it up:

1.gif

now my Design hierarchy is looking like the below figure:

2.gif

the "orange question mark" means what exactly?

when i go to synthesize the top model i get the error:

3.gif


im obviously missing some step between creating my symbol "PISO" and it being usefull to another project file. could anyone help me out on this? thanks in advance! :)
 

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