Hi Gang,

Thank you for your quick answer! I was under the wrong impression that -bsVars is only to be used if I have two groups or more.

### I followed your suggestion but got the following error:
** Error:
Failed at GLT No. 1! Make sure that the model or GLT specification syntax is correct.


### This was the cmd:
3dMVM -prefix $output_dir/mvm_time_age \
-mask $output_dir/some_mask_intersection_dia1+tlrc \
-bsVars 'Age' \
-wsVars 'Time' \
-qVars 'Age' \
-num_glt 8 \
-gltLabel 1 t0_Age -gltCode 1 'Time : 1*t0 Age : 1*Age' \
-gltLabel 2 t1_Age -gltCode 2 'Time : 1*t1 Age : 1*Age' \
-gltLabel 3 t2_Age -gltCode 3 'Time : 1*t2 Age : 1*Age' \
-gltLabel 4 t3_Age -gltCode 4 'Time : 1*t3 Age : 1*Age' \
-gltLabel 5 t4_Age -gltCode 5 'Time : 1*t4 Age : 1*Age' \
-gltLabel 6 t5_Age -gltCode 6 'Time : 1*t5 Age : 1*Age' \
-gltLabel 7 t6_Age -gltCode 7 'Time : 1*t6 Age : 1*Age' \
-gltLabel 8 t7_Age -gltCode 8 'Time : 1*t7 Age : 1*Age' \
-dataTable \
Subj Time Gender Group Age InputFile \
01 t0 Male Control 67 $input_dir/01.results/stats.01_REML+tlrc'[bh#0_Coef]' \
...


### This is another warning message I got - does it have to do with the glts?
...
Warning messages:
1: NAs introduced by coercion
2: NAs introduced by coercion
3: NAs introduced by coercion
4: NAs introduced by coercion
5: NAs introduced by coercion
6: NAs introduced by coercion
7: NAs introduced by coercion
8: NAs introduced by coercion
Loading required package: lme4
Loading required package: Matrix
Loading required package: reshape2
Loading required package: lsmeans
Loading required package: estimability
************
Welcome to afex. Important changes in the current version:
- Functions for ANOVAs have been renamed to: aov_car(), aov_ez(), and aov_4().
- ANOVA functions return an object of class 'afex_aov' as default, see: ?aov_car
- 'afex_aov' objects can be passed to lsmeans for contrasts and follow-up tests.
- Reset previous (faster) behavior via: afex_options(return_aov='nice')
- Many more arguments can now be set globally via options, see: afex_options()
************
Warning message:
package ‘lsmeans’ was built under R version 3.2.3
Loading required package: car
Warning message:
package ‘car’ was built under R version 3.2.3

++++++++++++++++++++++++++++++++++++++++++++++++++++
***** Summary information of data structure *****
...


Thank you so much for your help!

Nic