I try to index PDF files with Sitecore 7. I installed IFilter , but I received on crawlers log next error :
ManagedPoolThread #17 09:24:20 WARN LuceneIndexOperations : Update : Could not build document data 4433434-3443-3223-91c4-233232. Skipping.
Exception: System.Runtime.InteropServices.COMException
Message: Error HRESULT E_FAIL has been returned from a call to a COM component.
Source: mscorlib
at System.Runtime.InteropServices.ComTypes.IPersistFile.Load(String pszFileName, Int32 dwMode)
at Sitecore.ContentSearch.Extracters.IFilterTextExtraction.FilterLoader.LoadAndInitIFilter(String fileName, String extension)
at Sitecore.ContentSearch.Extracters.IFilterTextExtraction.FilterReader..ctor(String fileName)
at Sitecore.ContentSearch.ComputedFields.MediaItemIFilterTextExtractor.ComputeFieldValue(IIndexable indexable)
at Sitecore.ContentSearch.ComputedFields.MediaItemContentExtractor.ComputeFieldValue(IIndexable indexable)
at Sitecore.ContentSearch.LuceneProvider.LuceneDocumentBuilder.AddComputedIndexFields()
at Sitecore.ContentSearch.LuceneProvider.LuceneIndexOperations.GetIndexData(IIndexable indexable, IIndexable latestVersion, IProviderUpdateContext context)
at Sitecore.ContentSearch.LuceneProvider.LuceneIndexOperations.BuildDataToIndex(IProviderUpdateContext context, IIndexable version, IIndexable latestVersion)
at Sitecore.ContentSearch.LuceneProvider.LuceneIndexOperations.<>c__DisplayClass7.<Update>b__0(Item version)
What I have to do work because on Sitecore documentation they said it must work out of the box.