diff --git a/mmgen/addrdata.py b/mmgen/addrdata.py
index 6abca301..000176b8 100755
--- a/mmgen/addrdata.py
+++ b/mmgen/addrdata.py
@@ -20,24 +20,22 @@
 addrdata.py: MMGen AddrData and related classes
 """
 
-from .util import vmsg,base_proto_subclass
+from .util import vmsg,base_proto_subclass,fmt,die
 from .base_obj import AsyncInit
 from .obj import MMGenObject,MMGenDict,get_obj
 from .addr import MMGenID,AddrListID
 from .addrlist import AddrListEntry,AddrListData,AddrList
 
 class AddrData(MMGenObject):
-	msgs = {
-	'too_many_acct_addresses': """
-ERROR: More than one address found for account: '{}'.
-Your 'wallet.dat' file appears to have been altered by a non-{} program.
-Please restore your tracking wallet from a backup or create a new one and
-re-import your addresses.
-""".strip()
-	}
 
-	def __new__(cls,proto,*args,**kwargs):
-		return MMGenObject.__new__(base_proto_subclass(cls,proto,'tw'))
+	msgs = {
+		'multiple_acct_addrs': """
+			ERROR: More than one address found for account: {acct!r}.
+			Your 'wallet.dat' file appears to have been altered by a non-{proj} program.
+			Please restore your tracking wallet from a backup or create a new one and
+			re-import your addresses.
+		"""
+	}
 
 	def __init__(self,proto,*args,**kwargs):
 		self.al_ids = {}
@@ -97,7 +95,8 @@ class TwAddrData(AddrData,metaclass=AsyncInit):
 			if l and l.mmid.type == 'mmgen':
 				obj = l.mmid.obj
 				if len(addr_array) != 1:
-					die(2,self.msgs['too_many_acct_addresses'].format(acct,g.prog_name))
+					message = self.msgs['multiple_acct_addrs'].strip().format( acct=acct, proj=g.proj_name )
+					die(3, fmt( message, indent='  ' ))
 				al_id = AddrListID(SeedID(sid=obj.sid),self.proto.addr_type(obj.mmtype))
 				if al_id not in out:
 					out[al_id] = []
@@ -105,6 +104,7 @@ class TwAddrData(AddrData,metaclass=AsyncInit):
 				i += 1
 
 		vmsg(f'{i} {g.prog_name} addresses found, {len(twd)} accounts total')
+
 		for al_id in out:
 			self.add(AddrList(self.proto,al_id=al_id,adata=AddrListData(sorted(out[al_id],key=lambda a: a.idx))))
 
diff --git a/mmgen/base_proto/ethereum/tw.py b/mmgen/base_proto/ethereum/tw.py
index 9308a4b9..1e9d1289 100755
--- a/mmgen/base_proto/ethereum/tw.py
+++ b/mmgen/base_proto/ethereum/tw.py
@@ -17,10 +17,10 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 """
-altcoins.base_proto.ethereum.tw: Ethereum tracking wallet dependency classes
+base_proto.ethereum.tw: Ethereum tracking wallet dependency classes
 """
 
-from ...addrdata import AddrData,TwAddrData
+from ...addrdata import TwAddrData
 
 class EthereumTwAddrData(TwAddrData):
 
@@ -32,7 +32,5 @@ class EthereumTwAddrData(TwAddrData):
 		# emulate the output of RPC 'listaccounts' and 'getaddressesbyaccount'
 		return [(mmid+' '+d['comment'],[d['addr']]) for mmid,d in list(tw.items())]
 
-class EthereumTokenTwAddrData(EthereumTwAddrData): pass
-
-class EthereumAddrData(AddrData): pass
-class EthereumTokenAddrData(EthereumAddrData): pass
+class EthereumTokenTwAddrData(EthereumTwAddrData):
+	pass
diff --git a/mmgen/base_proto/ethereum/twaddrs.py b/mmgen/base_proto/ethereum/twaddrs.py
index f5b29221..d8012629 100755
--- a/mmgen/base_proto/ethereum/twaddrs.py
+++ b/mmgen/base_proto/ethereum/twaddrs.py
@@ -17,7 +17,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 """
-altcoins.base_proto.ethereum.twaddrs: Ethereum tracking wallet listaddresses class
+base_proto.ethereum.twaddrs: Ethereum tracking wallet address list class
 """
 
 from ...twaddrs import TwAddrList
diff --git a/mmgen/base_proto/ethereum/twbal.py b/mmgen/base_proto/ethereum/twbal.py
index 02f949d1..59d6f57e 100755
--- a/mmgen/base_proto/ethereum/twbal.py
+++ b/mmgen/base_proto/ethereum/twbal.py
@@ -17,7 +17,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 """
-altcoins.base_proto.ethereum.twbal: Ethereum tracking wallet getbalance class
+base_proto.ethereum.twbal: Ethereum tracking wallet getbalance class
 """
 
 from ...twctl import TrackingWallet
@@ -29,7 +29,7 @@ class EthereumTwGetBalance(TwGetBalance):
 
 	async def __init__(self,proto,*args,**kwargs):
 		self.wallet = await TrackingWallet(proto,mode='w')
-		await TwGetBalance.__init__(self,proto,*args,**kwargs)
+		await super().__init__(proto,*args,**kwargs)
 
 	async def create_data(self):
 		data = self.wallet.mmid_ordered_dict
diff --git a/mmgen/base_proto/ethereum/twctl.py b/mmgen/base_proto/ethereum/twctl.py
index 1df5f2f0..83940e56 100755
--- a/mmgen/base_proto/ethereum/twctl.py
+++ b/mmgen/base_proto/ethereum/twctl.py
@@ -17,7 +17,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 """
-altcoins.base_proto.ethereum.twctl: Ethereum tracking wallet control class
+base_proto.ethereum.twctl: Ethereum tracking wallet control class
 """
 
 from ...util import msg,ymsg,write_mode,die
diff --git a/mmgen/base_proto/ethereum/twuo.py b/mmgen/base_proto/ethereum/twuo.py
index 470e0af1..41cdb7d1 100755
--- a/mmgen/base_proto/ethereum/twuo.py
+++ b/mmgen/base_proto/ethereum/twuo.py
@@ -17,7 +17,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 """
-altcoins.base_proto.ethereum.twuo: Ethereum tracking wallet unspent outputs class
+base_proto.ethereum.twuo: Ethereum tracking wallet unspent outputs class
 """
 
 from ...tw import TwLabel
@@ -26,6 +26,10 @@ from ...twuo import TwUnspentOutputs
 # No unspent outputs with Ethereum, but naming must be consistent
 class EthereumTwUnspentOutputs(TwUnspentOutputs):
 
+	class MMGenTwUnspentOutput(TwUnspentOutputs.MMGenTwUnspentOutput):
+		valid_attrs = {'txid','vout','amt','amt2','label','twmmid','addr','confs','skip'}
+		invalid_attrs = {'proto'}
+
 	disp_type = 'eth'
 	can_group = False
 	col_adj = 29
@@ -50,7 +54,7 @@ Actions:         [q]uit view, [p]rint to file, pager [v]iew, [w]ide view,
 		if g.cached_balances:
 			from ...color import yellow
 			self.hdr_fmt += '\n' + yellow('WARNING: Using cached balances. These may be out of date!')
-		await TwUnspentOutputs.__init__(self,proto,*args,**kwargs)
+		await super().__init__(proto,*args,**kwargs)
 
 	def do_sort(self,key=None,reverse=False):
 		if key == 'txid': return
@@ -67,12 +71,8 @@ Actions:         [q]uit view, [p]rint to file, pager [v]iew, [w]ide view,
 				'confirmations': 0, # TODO
 				} for d in wl]
 
-	class MMGenTwUnspentOutput(TwUnspentOutputs.MMGenTwUnspentOutput):
-		valid_attrs = {'txid','vout','amt','amt2','label','twmmid','addr','confs','skip'}
-		invalid_attrs = {'proto'}
-
 	def age_disp(self,o,age_fmt): # TODO
-		return None
+		pass
 
 class EthereumTokenTwUnspentOutputs(EthereumTwUnspentOutputs):
 
diff --git a/mmgen/exception.py b/mmgen/exception.py
index 9d010ba3..f04b5524 100755
--- a/mmgen/exception.py
+++ b/mmgen/exception.py
@@ -28,10 +28,12 @@ class MMGenError(Exception):
 		super().__init__(strerror)
 
 	def __repr__(self):
-		return f'{type(self).__name__}({self.mmcode}): {self}'
+		return f'{type(self).__name__}({self.mmcode}):\n{self}'
 
 class MMGenSystemExit(MMGenError):
-	pass
+
+	def __repr__(self):
+		return f'{type(self).__name__}({self.mmcode}): {self}'
 
 # 1: no hl, message only
 class UserNonConfirmation(Exception):     mmcode = 1
diff --git a/mmgen/main.py b/mmgen/main.py
index 331cf787..9a887870 100755
--- a/mmgen/main.py
+++ b/mmgen/main.py
@@ -60,9 +60,9 @@ def launch(mod):
 				0:   _o(nocolor, 1, '{message}'),
 				1:   _o(nocolor, 1, '{message}'),
 				2:   _o(yellow,  2, '{message}'),
-				3:   _o(yellow,  3, '\nMMGen Error ({name}): {message}'),
-				4:   _o(red,     4, '\nMMGen Fatal Error ({name}): {message}'),
-				'x': _o(yellow,  5, '\nMMGen Unhandled Exception ({name}): {message}'),
+				3:   _o(yellow,  3, '\nMMGen Error ({name}):\n{message}'),
+				4:   _o(red,     4, '\nMMGen Fatal Error ({name}):\n{message}'),
+				'x': _o(yellow,  5, '\nMMGen Unhandled Exception ({name}):\n{message}'),
 			}[getattr(e,'mmcode','x')]
 
 			(sys.stdout if getattr(e,'stdout',None) else sys.stderr).write(
diff --git a/scripts/create-token.py b/scripts/create-token.py
index 260494d6..1ebc77cc 100755
--- a/scripts/create-token.py
+++ b/scripts/create-token.py
@@ -272,7 +272,8 @@ if __name__ == '__main__':
 	code = create_src( proto, solidity_code_template, token_data, cmd_args[0] )
 
 	if opt.preprocess:
-		Die(0,code)
+		Msg(code)
+		sys.exit(0)
 
 	out = compile_code(code)
 
diff --git a/scripts/exec_wrapper.py b/scripts/exec_wrapper.py
index acb97e33..ef325541 100755
--- a/scripts/exec_wrapper.py
+++ b/scripts/exec_wrapper.py
@@ -44,6 +44,10 @@ def exec_wrapper_write_traceback(e):
 	if exc.startswith('SystemExit:'):
 		lines.pop()
 
+	if os.getenv('MMGEN_TEST_SUITE_DETERMINISTIC'):
+		pat = re.compile(", line [0-9]+,")
+		lines = [pat.sub(", line (scrubbed),",line) for line in lines]
+
 	c = exec_wrapper_get_colors()
 	message = ( repr(e) if type(e).__name__ in ('MMGenError','MMGenSystemExit') else exc )
 	sys.stdout.write('{}{}'.format(
diff --git a/test/overlay/fakemods/tw.py b/test/overlay/fakemods/tw.py
index 62547bfc..7697920a 100644
--- a/test/overlay/fakemods/tw.py
+++ b/test/overlay/fakemods/tw.py
@@ -16,5 +16,12 @@ if os.getenv('MMGEN_TEST_SUITE_DETERMINISTIC'):
 	}
 
 if os.getenv('MMGEN_BOGUS_WALLET_DATA'):
+
+	async def fake_set_dates(foo,rpc,us):
+		for o in us:
+			o.date = 1831006505 - int(9.7 * 60 * (o.confs - 1))
+
+	TwCommon.set_dates = fake_set_dates
+
 	# 1831006505 (09 Jan 2028) = projected time of block 1000000
 	TwCommon.date_formatter['days'] = lambda rpc,secs: (1831006505 - secs) // 86400
diff --git a/test/overlay/fakemods/twuo.py b/test/overlay/fakemods/twuo.py
index 86b4d9d5..e17b1889 100644
--- a/test/overlay/fakemods/twuo.py
+++ b/test/overlay/fakemods/twuo.py
@@ -3,15 +3,10 @@ from .twuo_orig import *
 
 if os.getenv('MMGEN_BOGUS_WALLET_DATA'):
 
-	async def fake_set_dates(foo,rpc,us):
-		for o in us:
-			o.date = 1831006505 - int(9.7 * 60 * (o.confs - 1))
-
 	async def fake_get_unspent_rpc(foo):
 		from decimal import Decimal
 		import json
 		from mmgen.fileutil import get_data_from_file
 		return json.loads(get_data_from_file(os.getenv('MMGEN_BOGUS_WALLET_DATA')),parse_float=Decimal)
 
-	TwUnspentOutputs.set_dates = fake_set_dates
 	TwUnspentOutputs.get_unspent_rpc = fake_get_unspent_rpc
diff --git a/test/test.py b/test/test.py
index d45e50eb..8b2bf847 100755
--- a/test/test.py
+++ b/test/test.py
@@ -608,7 +608,8 @@ class CmdGroupMgr(object):
 				cls.__doc__.strip() if cls.__doc__ else cls.__name__
 			))
 
-		Die(0,'\n'+' '.join(e[0] for e in ginfo))
+		Msg( '\n' + ' '.join(e[0] for e in ginfo) )
+		sys.exit(0)
 
 	def find_cmd_in_groups(self,cmd,group=None):
 		"""