and i got same error when trying to load it. apparently there is a problem with spec 1.5. Here the version which i want to produce: version22: spec <version: '2.2' imports: #('1.5-baseline' )> spec for: #'common' do: [ spec blessing: #'development'. spec description: 'Merge with oscog-eem.88'. spec author: 'IgorStasenko'. spec timestamp: '6/29/2011 17:27'. spec package: 'FFI-Pools' with: 'FFI-Pools-eem.3'; package: 'SharedPool-Speech' with: 'SharedPool-Speech-dtl.2'; package: 'Balloon-Engine-Pools' with: 'Balloon-Engine-Pools-JB.2'; package: 'Alien-Core' with: 'Alien-Core-IgorStasenko.68'; package: 'Sound' with: 'Sound-StephaneDucasse.62'; package: 'VMConstruction-Plugins-OSProcessPlugin' with: 'VMConstruction-Plugins-OSProcessPlugin-dtl.27'; package: 'Cog' with: 'Cog-eem.44'; package: 'VMMaker-oscog' with: 'VMMaker-oscog-IgorStasenko.90'; package: 'Qwaq-VMProfiling-Plugins' with: 'Qwaq-VMProfiling-Plugins-JB.5'; package: 'CMakeVMMaker' with: 'CMakeVMMaker-sig.110'. ]. i don't see why it doesn't works. do you? -- Best regards, Igor Stasenko AKA sig.