diff -r 86d8bbc99e7b -r 4fdbe30d8c58 src/AwkHandler.h
--- a/src/AwkHandler.h	Sat May 25 11:36:31 2019 +0200
+++ b/src/AwkHandler.h	Sat May 25 17:00:51 2019 +0200
@@ -41,6 +41,7 @@
 #include <relpipe/cli/RelpipeCLIException.h>
 
 #include "Configuration.h"
+#include "AwkException.h"
 
 namespace relpipe {
 namespace tr {
@@ -78,17 +79,17 @@
 		int result = pipe(fds);
 		readerFD = fds[0];
 		writerFD = fds[1];
-		if (result < 0) throw cli::RelpipeCLIException(L"Unable to create a pipe.", cli::CLI::EXIT_CODE_UNEXPECTED_ERROR); // TODO: better exceptions?
+		if (result < 0) throw AwkException(L"Unable to create a pipe.");
 	}
 
 	void redirectFD(int oldfd, int newfd) {
 		int result = dup2(oldfd, newfd);
-		if (result < 0) throw cli::RelpipeCLIException(L"Unable redirect FD.", cli::CLI::EXIT_CODE_UNEXPECTED_ERROR); // TODO: better exceptions?
+		if (result < 0) throw AwkException(L"Unable redirect FD.");
 	}
 
 	void closeOrThrow(int fd) {
 		int error = close(fd);
-		if (error) throw cli::RelpipeCLIException(L"Unable to close FD: " + to_wstring(fd) + L" from PID: " + to_wstring(getpid()), cli::CLI::EXIT_CODE_UNEXPECTED_ERROR); // TODO: better exceptions?
+		if (error) throw AwkException(L"Unable to close FD: " + to_wstring(fd) + L" from PID: " + to_wstring(getpid()));
 	}
 
 	void execp(const std::vector<std::string>& args) {
@@ -99,7 +100,7 @@
 		execvp(a[0], (char*const*) a);
 
 		delete[] a;
-		throw cli::RelpipeCLIException(L"Unable to do execvp().", cli::CLI::EXIT_CODE_UNEXPECTED_ERROR); // TODO: better exceptions?
+		throw AwkException(L"Unable to do execvp().");
 	}
 
 	/* TODO: move to lib-cli when stable and used in other modules */
@@ -161,7 +162,7 @@
 
 	string_t a2v(const string_t& attributeName) {
 		if (currenVariablesMapping.find(attributeName) != currenVariablesMapping.end()) return currenVariablesMapping[attributeName];
-		else throw cli::RelpipeCLIException(L"Unable to find value in currenVariablesMapping", cli::CLI::EXIT_CODE_UNEXPECTED_ERROR); // TODO: better exceptions?
+		else throw AwkException(L"Unable to find value in currenVariablesMapping");
 	}
 
 	template <typename K, typename V> bool containsValue(std::map<K, V> map, V value) {
@@ -218,7 +219,7 @@
 					if (ch == 't') currentValue << L'\t';
 					else if (ch == 'n') currentValue << L'\n';
 					else if (ch == '\\') currentValue << L'\\';
-					else throw cli::RelpipeCLIException(L"Unknown escape sequence. Only \\t, \\n and \\\\ are supported.", cli::CLI::EXIT_CODE_UNEXPECTED_ERROR); // TODO: better exceptions?
+					else throw AwkException(L"Unknown escape sequence. Only \\t, \\n and \\\\ are supported.");
 				} else {
 					currentValue << ch;
 				}
@@ -288,7 +289,7 @@
 			__pid_t awkPid = fork();
 
 			if (awkPid < 0) {
-				throw cli::RelpipeCLIException(L"Unable to fork AWK process.", cli::CLI::EXIT_CODE_UNEXPECTED_ERROR); // TODO: better exceptions?
+				throw AwkException(L"Unable to fork AWK process.");
 			} else if (awkPid == 0) {
 				// AWK child process
 				closeOrThrow(awkInputWriterFD);
@@ -379,7 +380,7 @@
 				__pid_t writerPid = fork();
 
 				if (writerPid < 0) {
-					throw cli::RelpipeCLIException(L"Unable to fork Writer process.", cli::CLI::EXIT_CODE_UNEXPECTED_ERROR); // TODO: better exceptions?
+					throw AwkException(L"Unable to fork Writer process.");
 				} else if (writerPid == 0) {
 					// Writer child process
 					closeOrThrow(awkInputWriterFD);