user82731: I activated timer 1 and its interrupt on the 2560 board and it works properly. Now I want to run Timer 4 as well. I installed the Timer 4 library, but when I compile the program, I get the following error. This error also occurs for timers 3 and 5:
C:\Users\win 8\Documents\Arduino\libraries\Timer5\Timer5.cpp:110:6: 
note: 'void startSlowCountingTimer5()' previously defined here
 void startSlowCountingTimer5(void) {

Thank you for your help.
The full text of the error is as follows
C:\Users\win 8\Documents\Arduino\libraries\Timer5\Timer5.cpp: In function 'void startSlowCountingTimer5()':

C:\Users\win 8\Documents\Arduino\libraries\Timer5\Timer5.cpp:127:6: error: redefinition of 'void startSlowCountingTimer5()'

 void startSlowCountingTimer5(void) {

C:\Users\win 8\Documents\Arduino\libraries\Timer5\Timer5.cpp:110:6: note: 'void startSlowCountingTimer5()' previously defined here

 void startSlowCountingTimer5(void) {


user7508: This is a bug in the library that was fixed in 2017! Please
upgrade.

82731: <p>I activated timer 1 and its interrupt on the 2560 board and it works properly. Now I want to run Timer 4 as well. I installed the Timer 4 library, but when I compile the program, I get the following error. This error also occurs for timers 3 and 5:</p>
<pre><code>C:\Users\win 8\Documents\Arduino\libraries\Timer5\Timer5.cpp:110:6: 
note: 'void startSlowCountingTimer5()' previously defined here
 void startSlowCountingTimer5(void) {
</code></pre>
<p>Thank you for your help.</p>
<p>The full text of the error is as follows</p>
<pre><code>C:\Users\win 8\Documents\Arduino\libraries\Timer5\Timer5.cpp: In function 'void startSlowCountingTimer5()':

C:\Users\win 8\Documents\Arduino\libraries\Timer5\Timer5.cpp:127:6: error: redefinition of 'void startSlowCountingTimer5()'

 void startSlowCountingTimer5(void) {

C:\Users\win 8\Documents\Arduino\libraries\Timer5\Timer5.cpp:110:6: note: 'void startSlowCountingTimer5()' previously defined here

 void startSlowCountingTimer5(void) {
</code></pre>
 7508: <p>This is a bug in the library that <a href="https://github.com/carlosrafaelgn/ArduinoTimer/pull/2" rel="nofollow noreferrer">was fixed in 2017</a>! Please
upgrade.</p>
