--- a/bc.mak	Tue Aug 20 15:31:03 2019 +0200
+++ b/bc.mak	Tue Aug 20 15:31:16 2019 +0200
@@ -83,6 +83,7 @@
 # BEGINMAKEDEPEND --- do not remove this line; make depend needs it
 $(OUTDIR)AVLTree.$(O) AVLTree.$(C) AVLTree.$(H): AVLTree.st $(INCLUDE_TOP)\stx\libbasic\Collection.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\SequenceableCollection.$(H) $(STCHDR)
 $(OUTDIR)AbstractBackgroundJob.$(O) AbstractBackgroundJob.$(C) AbstractBackgroundJob.$(H): AbstractBackgroundJob.st $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(STCHDR)
+$(OUTDIR)AbstractMultidimensionalArray.$(O) AbstractMultidimensionalArray.$(C) AbstractMultidimensionalArray.$(H): AbstractMultidimensionalArray.st $(INCLUDE_TOP)\stx\libbasic\Collection.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\SequenceableCollection.$(H) $(STCHDR)
 $(OUTDIR)ActiveObject.$(O) ActiveObject.$(C) ActiveObject.$(H): ActiveObject.st $(INCLUDE_TOP)\stx\libbasic\Lookup.$(H) $(INCLUDE_TOP)\stx\libbasic\Message.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(STCHDR)
 $(OUTDIR)ActorStream.$(O) ActorStream.$(C) ActorStream.$(H): ActorStream.st $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\PeekableStream.$(H) $(INCLUDE_TOP)\stx\libbasic\Stream.$(H) $(STCHDR)
 $(OUTDIR)Archiver.$(O) Archiver.$(C) Archiver.$(H): Archiver.st $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(STCHDR)
@@ -126,6 +127,7 @@
 $(OUTDIR)HandlerCollection.$(O) HandlerCollection.$(C) HandlerCollection.$(H): HandlerCollection.st $(INCLUDE_TOP)\stx\libbasic\Collection.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\OrderedCollection.$(H) $(INCLUDE_TOP)\stx\libbasic\SequenceableCollection.$(H) $(STCHDR)
 $(OUTDIR)Heap.$(O) Heap.$(C) Heap.$(H): Heap.st $(INCLUDE_TOP)\stx\libbasic\Collection.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\SequenceableCollection.$(H) $(STCHDR)
 $(OUTDIR)IdentityBag.$(O) IdentityBag.$(C) IdentityBag.$(H): IdentityBag.st $(INCLUDE_TOP)\stx\libbasic\Bag.$(H) $(INCLUDE_TOP)\stx\libbasic\Collection.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(STCHDR)
+$(OUTDIR)IncompatibleMatrixError.$(O) IncompatibleMatrixError.$(C) IncompatibleMatrixError.$(H): IncompatibleMatrixError.st $(INCLUDE_TOP)\stx\libbasic\ArithmeticError.$(H) $(INCLUDE_TOP)\stx\libbasic\DomainError.$(H) $(INCLUDE_TOP)\stx\libbasic\Error.$(H) $(INCLUDE_TOP)\stx\libbasic\Exception.$(H) $(INCLUDE_TOP)\stx\libbasic\ExecutionError.$(H) $(INCLUDE_TOP)\stx\libbasic\GenericException.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\ProceedableError.$(H) $(STCHDR)
 $(OUTDIR)IncrementNotification.$(O) IncrementNotification.$(C) IncrementNotification.$(H): IncrementNotification.st $(INCLUDE_TOP)\stx\libbasic\GenericException.$(H) $(INCLUDE_TOP)\stx\libbasic\Notification.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(STCHDR)
 $(OUTDIR)IndentStream.$(O) IndentStream.$(C) IndentStream.$(H): IndentStream.st $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\PeekableStream.$(H) $(INCLUDE_TOP)\stx\libbasic\PositionableStream.$(H) $(INCLUDE_TOP)\stx\libbasic\Stream.$(H) $(INCLUDE_TOP)\stx\libbasic\WriteStream.$(H) $(STCHDR)
 $(OUTDIR)InterestConverterWithParameters.$(O) InterestConverterWithParameters.$(C) InterestConverterWithParameters.$(H): InterestConverterWithParameters.st $(INCLUDE_TOP)\stx\libbasic\InterestConverter.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(STCHDR)
@@ -197,7 +199,7 @@
 $(OUTDIR)TextClassifier.$(O) TextClassifier.$(C) TextClassifier.$(H): TextClassifier.st $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(STCHDR)
 $(OUTDIR)TextStream.$(O) TextStream.$(C) TextStream.$(H): TextStream.st $(INCLUDE_TOP)\stx\libbasic\CharacterWriteStream.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\PeekableStream.$(H) $(INCLUDE_TOP)\stx\libbasic\PositionableStream.$(H) $(INCLUDE_TOP)\stx\libbasic\Stream.$(H) $(INCLUDE_TOP)\stx\libbasic\WriteStream.$(H) $(STCHDR)
 $(OUTDIR)TreeSet.$(O) TreeSet.$(C) TreeSet.$(H): TreeSet.st $(INCLUDE_TOP)\stx\libbasic\Collection.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(STCHDR)
-$(OUTDIR)Trie.$(O) Trie.$(C) Trie.$(H): Trie.st $(INCLUDE_TOP)\stx\libbasic\Collection.$(H) $(INCLUDE_TOP)\stx\libbasic\Dictionary.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\SequenceableCollection.$(H) $(INCLUDE_TOP)\stx\libbasic\Set.$(H) $(STCHDR)
+$(OUTDIR)Trie.$(O) Trie.$(C) Trie.$(H): Trie.st $(INCLUDE_TOP)\stx\libbasic\Collection.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\SequenceableCollection.$(H) $(STCHDR)
 $(OUTDIR)URI.$(O) URI.$(C) URI.$(H): URI.st $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(STCHDR)
 $(OUTDIR)UUID.$(O) UUID.$(C) UUID.$(H): UUID.st $(INCLUDE_TOP)\stx\libbasic\ArrayedCollection.$(H) $(INCLUDE_TOP)\stx\libbasic\ByteArray.$(H) $(INCLUDE_TOP)\stx\libbasic\Collection.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\SequenceableCollection.$(H) $(INCLUDE_TOP)\stx\libbasic\UninterpretedBytes.$(H) $(STCHDR)
 $(OUTDIR)UndoSupport.$(O) UndoSupport.$(C) UndoSupport.$(H): UndoSupport.st $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(STCHDR)
@@ -239,6 +241,8 @@
 $(OUTDIR)IPSocketAddress.$(O) IPSocketAddress.$(C) IPSocketAddress.$(H): IPSocketAddress.st $(INCLUDE_TOP)\stx\libbasic\ArrayedCollection.$(H) $(INCLUDE_TOP)\stx\libbasic\Collection.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\SequenceableCollection.$(H) $(INCLUDE_TOP)\stx\libbasic\UninterpretedBytes.$(H) $(INCLUDE_TOP)\stx\libbasic2\SocketAddress.$(H) $(STCHDR)
 $(OUTDIR)LazyCons.$(O) LazyCons.$(C) LazyCons.$(H): LazyCons.st $(INCLUDE_TOP)\stx\libbasic\Collection.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\SequenceableCollection.$(H) $(INCLUDE_TOP)\stx\libbasic2\Cons.$(H) $(STCHDR)
 $(OUTDIR)LineNumberReadStream.$(O) LineNumberReadStream.$(C) LineNumberReadStream.$(H): LineNumberReadStream.st $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\PeekableStream.$(H) $(INCLUDE_TOP)\stx\libbasic\Stream.$(H) $(INCLUDE_TOP)\stx\libbasic2\FilteringStream.$(H) $(STCHDR)
+$(OUTDIR)Matrix.$(O) Matrix.$(C) Matrix.$(H): Matrix.st $(INCLUDE_TOP)\stx\libbasic\Collection.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\SequenceableCollection.$(H) $(INCLUDE_TOP)\stx\libbasic2\AbstractMultidimensionalArray.$(H) $(STCHDR)
+$(OUTDIR)MultiDimensionalArrayAccessor.$(O) MultiDimensionalArrayAccessor.$(C) MultiDimensionalArrayAccessor.$(H): MultiDimensionalArrayAccessor.st $(INCLUDE_TOP)\stx\libbasic\Collection.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\SequenceableCollection.$(H) $(INCLUDE_TOP)\stx\libbasic2\AbstractMultidimensionalArray.$(H) $(STCHDR)
 $(OUTDIR)PostscriptPrinterStream.$(O) PostscriptPrinterStream.$(C) PostscriptPrinterStream.$(H): PostscriptPrinterStream.st $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\Stream.$(H) $(INCLUDE_TOP)\stx\libbasic2\PrinterStream.$(H) $(STCHDR)
 $(OUTDIR)RandomGNUSmalltalk.$(O) RandomGNUSmalltalk.$(C) RandomGNUSmalltalk.$(H): RandomGNUSmalltalk.st $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\Stream.$(H) $(INCLUDE_TOP)\stx\libbasic2\Random.$(H) $(STCHDR)
 $(OUTDIR)RandomGenerator.$(O) RandomGenerator.$(C) RandomGenerator.$(H): RandomGenerator.st $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\Stream.$(H) $(INCLUDE_TOP)\stx\libbasic2\Random.$(H) $(STCHDR)
@@ -258,8 +262,12 @@
 $(OUTDIR)HttpURI.$(O) HttpURI.$(C) HttpURI.$(H): HttpURI.st $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic2\HierarchicalURI.$(H) $(INCLUDE_TOP)\stx\libbasic2\URI.$(H) $(STCHDR)
 $(OUTDIR)IPv6SocketAddress.$(O) IPv6SocketAddress.$(C) IPv6SocketAddress.$(H): IPv6SocketAddress.st $(INCLUDE_TOP)\stx\libbasic\ArrayedCollection.$(H) $(INCLUDE_TOP)\stx\libbasic\Collection.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\SequenceableCollection.$(H) $(INCLUDE_TOP)\stx\libbasic\UninterpretedBytes.$(H) $(INCLUDE_TOP)\stx\libbasic2\IPSocketAddress.$(H) $(INCLUDE_TOP)\stx\libbasic2\SocketAddress.$(H) $(STCHDR)
 $(OUTDIR)SftpURI.$(O) SftpURI.$(C) SftpURI.$(H): SftpURI.st $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic2\HierarchicalURI.$(H) $(INCLUDE_TOP)\stx\libbasic2\URI.$(H) $(STCHDR)
+$(OUTDIR)TwoDimensionalMatrix.$(O) TwoDimensionalMatrix.$(C) TwoDimensionalMatrix.$(H): TwoDimensionalMatrix.st $(INCLUDE_TOP)\stx\libbasic\Collection.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\SequenceableCollection.$(H) $(INCLUDE_TOP)\stx\libbasic2\AbstractMultidimensionalArray.$(H) $(INCLUDE_TOP)\stx\libbasic2\Matrix.$(H) $(STCHDR)
 $(OUTDIR)UnlimitedSharedQueue.$(O) UnlimitedSharedQueue.$(C) UnlimitedSharedQueue.$(H): UnlimitedSharedQueue.st $(INCLUDE_TOP)\stx\libbasic\Collection.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic2\Queue.$(H) $(INCLUDE_TOP)\stx\libbasic2\SharedQueue.$(H) $(STCHDR)
 $(OUTDIR)HttpsURI.$(O) HttpsURI.$(C) HttpsURI.$(H): HttpsURI.st $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic2\HierarchicalURI.$(H) $(INCLUDE_TOP)\stx\libbasic2\HttpURI.$(H) $(INCLUDE_TOP)\stx\libbasic2\URI.$(H) $(STCHDR)
+$(OUTDIR)SquareMatrix.$(O) SquareMatrix.$(C) SquareMatrix.$(H): SquareMatrix.st $(INCLUDE_TOP)\stx\libbasic\Collection.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\SequenceableCollection.$(H) $(INCLUDE_TOP)\stx\libbasic2\AbstractMultidimensionalArray.$(H) $(INCLUDE_TOP)\stx\libbasic2\Matrix.$(H) $(INCLUDE_TOP)\stx\libbasic2\TwoDimensionalMatrix.$(H) $(STCHDR)
+$(OUTDIR)Matrix2_2.$(O) Matrix2_2.$(C) Matrix2_2.$(H): Matrix2_2.st $(INCLUDE_TOP)\stx\libbasic\Collection.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\SequenceableCollection.$(H) $(INCLUDE_TOP)\stx\libbasic2\AbstractMultidimensionalArray.$(H) $(INCLUDE_TOP)\stx\libbasic2\Matrix.$(H) $(INCLUDE_TOP)\stx\libbasic2\SquareMatrix.$(H) $(INCLUDE_TOP)\stx\libbasic2\TwoDimensionalMatrix.$(H) $(STCHDR)
+$(OUTDIR)Matrix3_3.$(O) Matrix3_3.$(C) Matrix3_3.$(H): Matrix3_3.st $(INCLUDE_TOP)\stx\libbasic\Collection.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\SequenceableCollection.$(H) $(INCLUDE_TOP)\stx\libbasic2\AbstractMultidimensionalArray.$(H) $(INCLUDE_TOP)\stx\libbasic2\Matrix.$(H) $(INCLUDE_TOP)\stx\libbasic2\SquareMatrix.$(H) $(INCLUDE_TOP)\stx\libbasic2\TwoDimensionalMatrix.$(H) $(STCHDR)
 $(OUTDIR)extensions.$(O): extensions.st $(INCLUDE_TOP)\stx\libbasic\ArithmeticValue.$(H) $(INCLUDE_TOP)\stx\libbasic\ArrayedCollection.$(H) $(INCLUDE_TOP)\stx\libbasic\Block.$(H) $(INCLUDE_TOP)\stx\libbasic\CharacterArray.$(H) $(INCLUDE_TOP)\stx\libbasic\Collection.$(H) $(INCLUDE_TOP)\stx\libbasic\CompiledCode.$(H) $(INCLUDE_TOP)\stx\libbasic\ExecutableFunction.$(H) $(INCLUDE_TOP)\stx\libbasic\Float.$(H) $(INCLUDE_TOP)\stx\libbasic\Integer.$(H) $(INCLUDE_TOP)\stx\libbasic\LimitedPrecisionReal.$(H) $(INCLUDE_TOP)\stx\libbasic\Magnitude.$(H) $(INCLUDE_TOP)\stx\libbasic\Number.$(H) $(INCLUDE_TOP)\stx\libbasic\Object.$(H) $(INCLUDE_TOP)\stx\libbasic\SequenceableCollection.$(H) $(INCLUDE_TOP)\stx\libbasic\Stream.$(H) $(INCLUDE_TOP)\stx\libbasic\UninterpretedBytes.$(H) $(STCHDR)
 
 # ENDMAKEDEPEND --- do not remove this line