missing separator problem that doesn't relate to text editor - c++

Question

I have the following makefile in my c++ program
#All Targets
all: bin/cTrace
bin/cTrace: bin/main.o bin/agent.o bin/session.o bin/graph.o bin/tree.o
#echo 'Building target: main'
#echo 'Invoking: C++ Linker'
g++ -o bin/cTrace bin/main.o bin/agent.o bin/graph.o bin/tree.o bin/session.o
#echo 'Finished building target: main'
#echo ' '
bin/main.o: src/main.cpp
g++ -g -Wall -Weffc++ -std=c++11 -c -Iinclude -o bin/main.o src/main.cpp
bin/agent.o: src/Agent.cpp
g++ -g -Wall -Weffc++ -std=c++11 -c -Iinclude -o bin/agent.o src/Agent.cpp
bin/session.o: src/Session.cpp
g++ -g -Wall -Weffc++ -std=c++11 -c -Iinclude -o bin/session.o src/Session.cpp
bin/graph.o: src/Graph.cpp
g++ -g -Wall -Weffc++ -std=c++11 -c -Iinclude -o bin/graph.o src/Graph.cpp
bin/tree.o: src/Tree.cpp
g++ -g -Wall -Weffc++ -std=c++11 -c -Iinclude -o bin/tree.o src/Tree.cpp
but when I write at the terminal: make I get the following message:
'makefile:7 *** missing separator stop'
I have been looking for the problem and I understand that the main cause is that the text editor may change tab to space so I check throughout all my makefile and I hadn't found any problem.
What else can cause it?
edit:
after I compile cat -e -t -v Makefile I get the following result:
spl211#spl211:~/CLionProjects/cTrace$ cat -e -t -v makefile
#All Targets^M$
all: bin/cTrace^M$
^M$
bin/cTrace: bin/main.o bin/agent.o bin/session.o bin/graph.o bin/tree.o^M$
#echo 'Building target: main'^M$
#echo 'Invoking: C++ Linker'^M$
g++ -o bin/cTrace bin/main.o bin/agent.o bin/graph.o bin/tree.o bin/session.o^M$
#echo 'Finished building target: main'^M$
#echo ' '^M$
^M$
bin/main.o: src/main.cpp^M$
g++ -g -Wall -Weffc++ -std=c++11 -c -Iinclude -o bin/main.o src/main.cpp^M$
^M$
bin/agent.o: src/Agent.cpp^M$
g++ -g -Wall -Weffc++ -std=c++11 -c -Iinclude -o bin/agent.o src/Agent.cpp^M$
^M$
bin/session.o: src/Session.cpp^M$
g++ -g -Wall -Weffc++ -std=c++11 -c -Iinclude -o bin/session.o src/Session.cpp^M$
^M$
bin/graph.o: src/Graph.cpp^M$
g++ -g -Wall -Weffc++ -std=c++11 -c -Iinclude -o bin/graph.o src/Graph.cpp^M$
^M$
bin/tree.o: src/Tree.cpp^M$
g++ -g -Wall -Weffc++ -std=c++11 -c -Iinclude -o bin/tree.o src/Tree.cpp