I don't understand why, Catkin don't generate message headers. I have two packages. With one of them (ppldetection) catkin works properly -- all headers are generated. But for another (rosjohnny5) -- it not works. Here CMakeList.txt for the both packages:

ppl_detection

cmakeminimumrequired(VERSION 2.8.3)
project(ppl_detection)


set(CMAKEBUILDTYPE Debug)

findpackage(catkin REQUIRED COMPONENTS 
    roscpp
    rospy
    stdmsgs
    messagegeneration
    roslaunch
    tf
    pclros
    lasergeometry
    visualizationmsgs
    geometry_msgs
)

find_package(PCL)

addmessagefiles(
    FILES
    Human.msg
    Tracker.msg
)

generatemessages(
    DEPENDENCIES
    stdmsgs
    geometrymsgs
    visualizationmsgs
)

catkin specific configuration

catkinpackage(
    INCLUDEDIRS include
    #  LIBRARIES rosssc32
    CATKINDEPENDS messageruntime
    #  DEPENDS systemlib
)

Build

includedirectories(
    ${catkinINCLUDEDIRS}
    ${PCLINCLUDE_DIRS}
    include
)

addlibrary(ppldetection 
    src/svm.cpp
    src/pca.cpp
    src/plyfile.c
)

addexecutable(kinectdetect 
    src/kinect_detect.cpp
)

targetlinklibraries(kinectdetect 
    ppldetection
    ${catkinLIBRARIES}
    ${PCLLIBRARIES}
)

adddependencies(kinectdetect
    ${PROJECTNAME}generatemessagescpp
)

add_executable(train 
    src/train.cpp
)

targetlinklibraries(train 
    ppldetection
    ${catkinLIBRARIES}
    ${PCL_LIBRARIES}
)

adddependencies(train
    ${PROJECTNAME}generatemessages_cpp
)

add_executable(predict 
    src/predict.cpp
)

targetlinklibraries(predict 
    ppldetection
    ${catkinLIBRARIES}
    ${PCL_LIBRARIES}
)

adddependencies(predict
    ${PROJECTNAME}generatemessages_cpp
)

ros_johnny5

cmakeminimumrequired(VERSION 2.8.3)
project(ros_johnny5)


set(CMAKEBUILDTYPE Debug)

Find catkin macros and libraries

if COMPONENTS list like find_package(catkin REQUIRED COMPONENTS xyz)

is used, also find other catkin packages

findpackage(catkin REQUIRED COMPONENTS 
    roscpp
    rospy
    stdmsgs
    roslaunch
    tf
    ppldetection
    genmsg
    messagegeneration
)

Declare ROS messages, services and actions

addmessagefiles(
    FILES
    servoMsg.msg
    servoMsgArray.msg
    robotState.msg
)

Generate added messages and services with any dependencies listed here

generatemessages(
    DEPENDENCIES
    stdmsgs
)

catkin specific configuration

catkinpackage(
    INCLUDEDIRS inc

LIBRARIES ros_ssc32

CATKIN_DEPENDS message_runtime std_msgs


DEPENDS system_lib

)

Build

includedirectories(
    ${catkinINCLUDEDIRS}
    ${BoostINCLUDE_DIRS}
    inc
)

Declare a cpp executable

#### SSC32 NODE

set(SSC32HEADERS
    inc/rosssc32.h
)

set(SSC32SOURCES
    src/rosssc32.cpp
)

addexecutable(rosssc32
    ${SSC32SOURCES}
    ${SSC32HEADERS}
)

addlibrary(rosssc32_lib
    src/servo.cpp
    src/serial.cpp
    src/robot.cpp
)

targetlinklibraries(rosssc32
    ${catkinLIBRARIES}
    ${BoostLIBRARIES}
    rosssc32_lib
)

adddependencies(rosssc32
   rosjohnny5generatemessagescpp
)

#### SSC32 NODE END

#### BAL NODE

set(BALINCLUDES
    inc/johnnylife.h
)

set(BALSOURCES
    src/johnnylife.cpp
)

addexecutable(johnnylife
    ${BALINCLUDES}
    ${BALSOURCES}
)

addlibrary(johnnylife_lib
    src/positions.cpp
)

targetlinklibraries(johnnylife
    ${catkinLIBRARIES}
    ${BoostLIBRARIES}
    johnnylife_lib
)

adddependencies(johnnylife
    ppldetectiongeneratemessagescpp
)

#### BAL NODE END

#### TEST NODE

set(TEST_INCLUDES
    inc/servo.h
    inc/serial.h
    inc/topics.h
    inc/robot.h
)

set(TEST_SOURCES
    src/test.cpp
    src/servo.cpp
    src/serial.cpp
    inc/topics.h
    src/robot.cpp
)

addexecutable(testnode
    ${TESTINCLUDES}
    ${TESTSOURCES}
)

targetlinklibraries(testnode
    ${catkinLIBRARIES}
    ${Boost_LIBRARIES}
)

adddependencies(testnode
   rosjohnny5generatemessagescpp
)

#### TEST NODE END

#### TRACKING NODE

set(TRACKINGINCLUDES
    inc/johnnyskeletontracking.h
    inc/rawmodel.h
)

set(TRACKINGSOURCES
    src/johnnyskeletontracking.cpp
    src/rawmodel.cpp
)

addexecutable(trackingnode
    ${TRACKINGINCLUDES}
    ${TRACKINGSOURCES}
)

targetlinklibraries(trackingnode
    ${catkinLIBRARIES}
    ${Boost_LIBRARIES}
)

adddependencies(trackingnode
   rosjohnny5generatemessagescpp
)

#### TRACKING NODE END