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+#ifndef MOC_ERROR_H_
+#define MOC_ERROR_H_
+
+
+/**
+ * \addtogroup environment_error
+ *
+ * This section describes how errors are handled.
+ *
+ * Every function should return an integer if possible. This integer should be
+ * MOC_SUCCESS if the operation teminated successfully otherwise an error-code
+ * telling the reason of the error is returned.
+ *
+ * For more information see Chapter 7.2 of the MPI 1.3 Standard.
+ **/
+//@{
+
+
+
+/**
+ * @name MPI_ERROR-CLASSES
+ *
+ * Error-classes defined by the MPI-standard. Every error-code returned by a
+ * MOC-function should belong to an error-class or be an error-class itself.
+ * This enables implementation-independend error-handling.
+ *
+ * Value-range: 0 = MOC_SUCCESS < MOC_ERR_... <= MOC_ERR_LASTCODE
+ **/
+//@{
+#define MOC_SUCCESS					    0	/**< No error */
+#define MOC_ERR_BUFFER				 1000	/**< Invalid buffer pointer */
+#define MOC_ERR_COUNT 				 2000	/**< Invalid count argument */
+#define MOC_ERR_TYPE 				 3000	/**< Invalid datatype argument */
+#define MOC_ERR_TAG					 4000	/**< Invalid tag argument */
+#define MOC_ERR_COMM 				 5000	/**< Invalid communicator */
+#define MOC_ERR_RANK 				 6000	/**< Invalid rank */
+#define MOC_ERR_REQUEST 			 7000	/**< Invalid request (handle) */
+#define MOC_ERR_ROOT 				 8000	/**< Invalid root */
+#define MOC_ERR_GROUP 				 9000	/**< Invalid group */
+#define MOC_ERR_OP 					10000	/**< Invalid operation */
+#define MOC_ERR_TOPOLOGY 			11000	/**< Invalid topology */
+#define MOC_ERR_DIMS 				12000	/**< Invalid dimension argument */
+#define MOC_ERR_ARG 				13000	/**< Invalid argument of some other kind */
+#define MOC_ERR_UNKNOWN 			14000	/**< Unknown error */
+#define MOC_ERR_TRUNCATE 			15000	/**< Message truncated on receive */
+#define MOC_ERR_OTHER 				16000	/**< Known error not in this list */
+#define MOC_ERR_INTERN 				17000	/**< Internal MOC (implementation) error */
+#define MOC_ERR_IN_STATUS 			18000	/**< Error code is in status */
+#define MOC_ERR_PENDING 			19000	/**< Pending request */
+#define MOC_ERR_LASTCODE 			20000	/**< Last error code */
+//@}
+
+
+
+/**
+ * @name MOC-Error-Codes
+ *
+ * Implementation dependent Error-Codes.
+ **/
+//@{
+#define MOC_ERR_NOT_IMPLEMENTED			17001	/**< Function not implemented */
+#define MOC_ERR_BUFFER_OVERFLOW			17002	/**< Internal Buffer Overflow */
+#define MOC_ERR_NO_MEMORY				17003	/**< Insufficient Memory */
+#define MOC_ERR_NO_BUFFER				17004	/**< Insufficient Buffer-Space */
+#define MOC_ERR_MESSAGE_EXHAUSTED		17005   /**< No further messages possible */
+#define MOC_ERR_BAD_ALIGNMENT			16001	/**< Base-Adress of Buffer isn't 16-byte aligned */
+#define MOC_ERR_BAD_SIZE				16002	/**< Bad Size (probably no multiple of 16) */
+//@}
+
+
+//@}
+#endif /*MOC_ERROR_H_*/