diff --git a/preprocessor b/preprocessor
index ca375041b..150e9f05d 160000
--- a/preprocessor
+++ b/preprocessor
@@ -1 +1 @@
-Subproject commit ca375041bb0860341aef5df1487413576973c092
+Subproject commit 150e9f05d5b164b728800ed9592d75071c765fb4
diff --git a/tests/pac/trend-component-13a/example.mod b/tests/pac/trend-component-13a/example.mod
index da102a915..0ae12e910 100644
--- a/tests/pac/trend-component-13a/example.mod
+++ b/tests/pac/trend-component-13a/example.mod
@@ -69,6 +69,6 @@ end;
 // Initialize the PAC model (build the Companion VAR representation for the auxiliary model).
 pac.initialize('pacman');
 
-if ~isequal(M_.pac.pacman.equations.(M_.pac.pacman.tag_map{strcmp(M_.pac.pacman.tag_map(:,1), 'zpac'),2}).ec.istarget, [true, false])
+if ~isequal(M_.pac.pacman.equations.(M_.pac.pacman.tag_map{strcmp(M_.pac.pacman.tag_map(:,1), 'zpac'),2}).ec.istarget, [false, true])
    error('ec.istarget vector is wrong.')
 end
diff --git a/tests/pac/trend-component-13b/example.mod b/tests/pac/trend-component-13b/example.mod
index 49d275bb5..da102a915 100644
--- a/tests/pac/trend-component-13b/example.mod
+++ b/tests/pac/trend-component-13b/example.mod
@@ -52,7 +52,7 @@ x1bar = x1bar(-1) + ex1bar;
 x2bar = x2bar(-1) + ex2bar;
 
 [name='zpac']
-diff(z) = e_c_m*(z(-1)-x1(-1)) + c_z_1*diff(z(-1))  + c_z_2*diff(z(-2)) + pac_expectation(pacman) + ez;
+diff(z) = e_c_m*(x1(-1)-z(-1)) + c_z_1*diff(z(-1))  + c_z_2*diff(z(-2)) + pac_expectation(pacman) + ez;
 
 end;
 
@@ -69,6 +69,6 @@ end;
 // Initialize the PAC model (build the Companion VAR representation for the auxiliary model).
 pac.initialize('pacman');
 
-if ~isequal(M_.pac.pacman.equations.(M_.pac.pacman.tag_map{strcmp(M_.pac.pacman.tag_map(:,1), 'zpac'),2}).ec.istarget, [false, true])
+if ~isequal(M_.pac.pacman.equations.(M_.pac.pacman.tag_map{strcmp(M_.pac.pacman.tag_map(:,1), 'zpac'),2}).ec.istarget, [true, false])
    error('ec.istarget vector is wrong.')
 end
diff --git a/tests/trend-component-and-var-models/tcm6.mod b/tests/trend-component-and-var-models/tcm6.mod
index 95c960a09..a44bd6b42 100644
--- a/tests/trend-component-and-var-models/tcm6.mod
+++ b/tests/trend-component-and-var-models/tcm6.mod
@@ -108,15 +108,15 @@ diff(diff(log(U2_HH_OCOR))) =  u2_hh_ocor_ecm_u2_q_yed_L1   * (U2_Q_YED(-1) - U2
 U2_H_Q_YER400 = U2_H_Q_YER400(-1) + res_U2_H_Q_YER;
 
 [name='zpac']
-diff(log(U2_HH_COR)) = ecm_pac*(log(U2_HH_COR(-1))-log(U2_HH_OCOR(-1))) +
+diff(log(U2_HH_COR)) = ecm_pac*(log(U2_HH_OCOR(-1))-log(U2_HH_COR(-1))) +
                   u2_hh_cor_pac_u2_hh_cor_L1*diff(log(U2_HH_COR(-1))) +
                   pac_expectation(pacman)   +
                   res_ez;
 
 [name='zpac1']
-diff(log(U2_HH_COR1)) = ecm_pac*(log(U2_HH_COR1(-1))-log(U2_HH_OCOR(-1))) +
+diff(log(U2_HH_COR1)) = ecm_pac*(log(U2_HH_OCOR(-1))-log(U2_HH_COR1(-1))) +
                   u2_hh_cor_pac_u2_hh_cor_L1*diff(log(U2_HH_COR1(-1))) +
-                  pac_expectation(pacman1)   +
+                  pac_expectation(pacman1) +
                   res_ez;
 
 end;
diff --git a/tests/trend-component-and-var-models/tcm7.mod b/tests/trend-component-and-var-models/tcm7.mod
index 01c4dd6ee..d83815aae 100644
--- a/tests/trend-component-and-var-models/tcm7.mod
+++ b/tests/trend-component-and-var-models/tcm7.mod
@@ -109,15 +109,15 @@ diff(U2_STN)   =   u2_stn_ecm_u2_q_yed_L1   * (U2_Q_YED(-1) - U2_EHIC(-1))
                  + res_U2_STN                                             ;
 
 [name='zpac']
-diff(log(U2_HH_COR)) = ecm_pac*(log(U2_HH_COR(-1))-log(U2_HH_OCOR(-1))) +
+diff(log(U2_HH_COR)) = ecm_pac*(log(U2_HH_OCOR(-1))-log(U2_HH_COR(-1))) +
                   u2_hh_cor_pac_u2_hh_cor_L1*diff(log(U2_HH_COR(-1))) +
                   pac_expectation(pacman)   +
                   res_ez;
 
 [name='zpac1']
-diff(log(U2_HH_COR1)) = ecm_pac*(log(U2_HH_COR1(-1))-log(U2_HH_OCOR(-1))) +
+diff(log(U2_HH_COR1)) = ecm_pac*(log(U2_HH_OCOR(-1))-log(U2_HH_COR1(-1))) +
                   u2_hh_cor_pac_u2_hh_cor_L1*diff(log(U2_HH_COR1(-1))) +
-                  pac_expectation(pacman1)   +
+                  pac_expectation(pacman1) +
                   res_ez;
 end;
 
diff --git a/tests/trend-component-and-var-models/tcm8.mod b/tests/trend-component-and-var-models/tcm8.mod
index 99f937be6..7269eb07e 100644
--- a/tests/trend-component-and-var-models/tcm8.mod
+++ b/tests/trend-component-and-var-models/tcm8.mod
@@ -108,13 +108,13 @@ diff(U2_STN)   =   u2_stn_ecm_u2_q_yed_L1   * (U2_Q_YED(-1) - U2_EHIC(-1))
                  + res_U2_STN                                             ;
 
 [name='zpac']
-diff(log(U2_HH_COR)) = ecm_pac*(log(U2_HH_COR(-1))-log(U2_HH_OCOR(-1))) +
+diff(log(U2_HH_COR)) = ecm_pac*(log(U2_HH_OCOR(-1))-log(U2_HH_COR(-1))) +
                   u2_hh_cor_pac_u2_hh_cor_L1*diff(log(U2_HH_COR(-1))) +
                   pac_expectation(pacman)   +
                   res_ez;
 
 [name='zpac1']
-diff(log(U2_HH_COR1)) = ecm_pac*(log(U2_HH_COR1(-1))-log(U2_HH_OCOR(-1))) +
+diff(log(U2_HH_COR1)) = ecm_pac*(log(U2_HH_OCOR(-1))-log(U2_HH_COR1(-1))) +
                   u2_hh_cor_pac_u2_hh_cor_L1*diff(log(U2_HH_COR1(-1))) +
                   pac_expectation(pacman1)   +
                   res_ez;