diff --git a/api/api_parser.py b/api/api_parser.py
index 69c35a1..bca8470 100644
--- a/api/api_parser.py
+++ b/api/api_parser.py
@@ -171,6 +171,9 @@ def _read_inp(inp: str) -> ChangeSet:
         elif name == 'END':
             pass # :)
 
+    # release file
+    file = {}
+
     cs = ChangeSet()
     priorities = [
         'PATTERNS',
diff --git a/build_db.py b/build_db.py
index 8329bf7..2da4a82 100644
--- a/build_db.py
+++ b/build_db.py
@@ -4,7 +4,7 @@ files = [
     'bwsn',
     'exnet',
     'fengxian',
-    'jbh',
+    #'jbh', # too big sql to compress
     'nanjing',
     'net3',
     'zj',
@@ -14,5 +14,11 @@ def inp2db():
     for file in files:
         read_inp(file, f'./inp/{file}.inp')
 
+def db2inp():
+    for file in files:
+        dump_inp(file, f'db_{file}.inp')
+
 if __name__ == '__main__':
-    inp2db()
\ No newline at end of file
+    #inp2db()
+    #db2inp()
+    pass
\ No newline at end of file
diff --git a/epanet/epanet-output.dll b/epanet/epanet-output.dll
new file mode 100644
index 0000000..bf41f44
Binary files /dev/null and b/epanet/epanet-output.dll differ
diff --git a/epanet/epanet2.dll b/epanet/epanet2.dll
new file mode 100644
index 0000000..a3bea5e
Binary files /dev/null and b/epanet/epanet2.dll differ
diff --git a/epanet/runepanet.exe b/epanet/runepanet.exe
new file mode 100644
index 0000000..4dcc24d
Binary files /dev/null and b/epanet/runepanet.exe differ
diff --git a/vcruntime140_1.dll b/epanet/vcruntime140_1.dll
similarity index 100%
rename from vcruntime140_1.dll
rename to epanet/vcruntime140_1.dll
diff --git a/epanet2.dll b/epanet2.dll
deleted file mode 100644
index 3bb592e..0000000
Binary files a/epanet2.dll and /dev/null differ