"The specified resource is reserved" in DAQ error

Dear all,
Earlier before I posted a thread on "stop error caused by device driver?". The problem was partially solved, however, new problems start to come up.
Basically the problem is that I have an PXI-6115 DAQ card, I used its two output channels to control my scan mirrors (by send two sawtooth waveform out). Everytime I finished one scan cycle, I need to put the mirror back to its originial position by using the same two output channels (sending two single voltage out). Since these two tasks are of different type, I created two different tasks: scanTask and parkTask. Then I do the following as suggeted by TheWoost:
1. create and configure task handles for scanTask
2. create and configure task handles for parkTask
3. start scanTask and stop after finished one scan cycle
4. start parkTask and stop after returning to orginial position
Then repeat 3 and 4. The problem comes in when I get to step 4: "Function DAQmxStartTask: (return value == -50103 [0xffff3c49]). The specified resource is reserved. The operation could not be completed as specified. Task Name: _unnamedTask<1> Status Code: -50103"
I browsed through the knowledge base and realized that I cannot have two tasks using the same output channel, even though only one of them is active. If I clear scanTask after stopping it, then recreate it when I need it, that would be fine. However, that would be too much trouble. I was wondering if my understanding is right. If yes, is there anyway to get around it? I need to run scanTask and parkTask in a loop and it would be hard to recreate the task everytime.
Any input is highly appreciated. Thank you for your time.
Best Regards,
Dan

Dear Rob,
Thank you for offering your expertise on this problem. I would be happy to include my code here. Right now I take the alternative approach by clearing each task after it's finished and then recreate them. It works fine but brings in complexity and inconvenience. If you can get away with this, that would be great.
The code is an except from the whole program. Since I changed it back and forth so many times, there might be some errors. The main part is focusButton and stopButton. When I hit focusButton, the two mirror outputTask are running. When I hit stopButton, I stop these tasks and call parkLaser function, which assign the outputTask to do single point output. Then I can do focus again. This is the part that gives problem.
If there is anything that is unclear, please let me know.
Best,
Dan
Attachments:
scanimage2.c ‏47 KB
Scanimage.uir ‏48 KB

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Hi all.
I'm sorry i put this post by mistake in Measurement Studio for.NET: smileyindifferent:
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Hi dsasorin,
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Will
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<init-param>
<param-name>encoding</param-name>
<param-value>EUC_JP</param-value>
</init-param>
</filter>
<filter>
<filter-name>Compression Filter</filter-name>
<filter-class>compressionFilters.CompressionFilter</filter-class>
<init-param>
<param-name>compressionThreshold</param-name>
<param-value>10</param-value>
</init-param>
<init-param>
<param-name>debug</param-name>
<param-value>0</param-value>
</init-param>
</filter>

<filter-mapping>
<filter-name>Servlet Mapped Filter</filter-name>
     <servlet-name>invoker</servlet-name>
</filter-mapping>
<filter-mapping>
<filter-name>Path Mapped Filter</filter-name>
     <url-pattern>/servlet/*</url-pattern>
</filter-mapping>





<listener>
<listener-class>listeners.ContextListener</listener-class>
</listener>
<listener>
<listener-class>listeners.SessionListener</listener-class>
</listener>

<servlet>
<servlet-name>CompressionFilterTestServlet</servlet-name>
<servlet-class>compressionFilters.CompressionFilterTestServlet</servlet
-class>
</servlet>
<servlet>
<servlet-name>hello</servlet-name>
<servlet-class>hello</servlet-class>
</servlet>
</servlet>
<servlet>
<servlet-name>HelloWorldExample</servlet-name>
<servlet-class>HelloWorldExample</servlet-class>
</servlet>
<servlet>
<servlet-name>RequestInfoExample</servlet-name>
<servlet-class>RequestInfoExample</servlet-class>
</servlet>
<servlet>
<servlet-name>RequestHeaderExample</servlet-name>
<servlet-class>RequestHeaderExample</servlet-class>
</servlet>
<servlet>
<servlet-name>RequestParamExample</servlet-name>
<servlet-class>RequestParamExample</servlet-class>
</servlet>
<servlet>
<servlet-name>CookieExample</servlet-name>
<servlet-class>CookieExample</servlet-class>
</servlet>
<servlet>
<servlet-name>SessionExample</servlet-name>
<servlet-class>SessionExample</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>CompressionFilterTestServlet</servlet-name>
<url-pattern>/CompressionTest</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>HelloWorldExample</servlet-name>
<url-pattern>/servlet/HelloWorldExample</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>RequestInfoExample</servlet-name>
<url-pattern>/servlet/RequestInfoExample/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>RequestHeaderExample</servlet-name>
<url-pattern>/servlet/RequestHeaderExample</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>RequestParamExample</servlet-name>
<url-pattern>/servlet/RequestParamExample</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>CookieExample</servlet-name>
<url-pattern>/servlet/CookieExample</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>SessionExample</servlet-name>
<url-pattern>/servlet/SessionExample</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>hello</servlet-name>
<url-pattern>/servlet/hello</url-pattern>
</servlet-mapping>
<security-constraint>
<display-name>Example Security Constraint</display-name>
<web-resource-collection>
<web-resource-name>Protected Area</web-resource-name>
     
<url-pattern>/jsp/security/protected/*</url-pattern>
     
     <http-method>DELETE</http-method>
<http-method>GET</http-method>
<http-method>POST</http-method>
     <http-method>PUT</http-method>
</web-resource-collection>
<auth-constraint>

<role-name>tomcat</role-name>
     <role-name>role1</role-name>
</auth-constraint>
</security-constraint>

<login-config>
<auth-method>FORM</auth-method>
<realm-name>Example Form-Based Authentication Area</realm-name>
<form-login-config>
<form-login-page>/jsp/security/protected/login.jsp</form-login-page>
<form-error-page>/jsp/security/protected/error.jsp</form-error-page>
</form-login-config>
</login-config>

<security-role>
<role-name>role1</role-name>
</security-role>
<security-role>
<role-name>tomcat</role-name>
</security-role>


<env-entry>
<env-entry-name>minExemptions</env-entry-name>
<env-entry-type>java.lang.Integer</env-entry-type>
<env-entry-value>1</env-entry-value>
</env-entry>
<env-entry>
<env-entry-name>foo/name1</env-entry-name>
<env-entry-type>java.lang.String</env-entry-type>
<env-entry-value>value1</env-entry-value>
</env-entry>
<env-entry>
<env-entry-name>foo/bar/name2</env-entry-name>
<env-entry-type>java.lang.Boolean</env-entry-type>
<env-entry-value>true</env-entry-value>
</env-entry>
<env-entry>
<env-entry-name>name3</env-entry-name>
<env-entry-type>java.lang.Integer</env-entry-type>
<env-entry-value>1</env-entry-value>
</env-entry>
<env-entry>
<env-entry-name>foo/name4</env-entry-name>
<env-entry-type>java.lang.Integer</env-entry-type>
<env-entry-value>10</env-entry-value>
</env-entry>
</web-app>
My program hello.java is given below
import java.io.*;
import javax.servlet.http.*;
import javax.servlet.*;
public class hello extends HttpServlet {
public void doGet (HttpServletRequest req,
HttpServletResponse res)
throws ServletException, IOException
PrintWriter out = res.getWriter();
out.println("Hello, world!");
out.close();
}

Labview Error 10608 occurred at an unidentified location. No transfer is in progress for the specified resource

I am using Measurement Computing Boards MiniLab1008 as my hardware. I have very basic VI which is using AI Acquire Waveform VI in it. Basically I am trying to do exactly which is on this link: http://www.seas.upenn.edu/ese/rca/software/Labview/myfirstvi.html
Attachments:
my2ndvi.vi ‏22 KB

You are using NI data acquisition functions with a non-NI board. That won't work. You need to get a LabVIEW driver from measurment computing and use those functions.

"The specified resource is reserved" in DAQ error

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